LIGHT FIXTURES, LIGHTING DEVICES, AND COMPONENTS FOR THE SAME

• US 20080137347A1
• Filed: 11/30/2007
• Published: 06/12/2008
• Est. Priority Date: 11/30/2006
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: LED Lighting Fixtures, Inc. (Wolfspeed, Inc.)
• Inventors: Pickard, Paul Kenneth, Van De Ven, Antony Paul, Adams, Edward Roger, Trott, Gary David
• Granted Patent: US 8,096,670 B2
• Time in Patent Office: Days
• US Class Current: 362/311
• CPC Class Codes: F21S 8/02 of recess-mounted type, e.g. downlighters specially adapted for vehicle exteriors F21S41/00-F21S45/00
• CPC Class Codes: F21V 17/007 with provision for shipment or storage
• CPC Class Codes: F21V 17/02 with provision for adjustment F21V17/04 - F21V17/08 take precedence
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A diffuser for a lighting device comprises a diffuser region, a hook element and a nose element. A light fixture comprises a housing with an opening and a diffuser as described above, in which the nose element extends through the opening, optionally further comprising an accessory including at least one spring element engaging the hook element. A light fixture structure comprises a housing defining an opening and an first attachment element comprising a nose element, a hook element and a connection region, and optionally further comprising a diffuser engaging a first portion of the hook element, and/or an accessory which engages a second portion of the hook element. An eyeball accessory comprises first and second housing elements pivotably attached to each other. An accessory for a light fixture comprises a housing member and a spring element engageable with a fixture.

Claims

1. A diffuser for a lighting device, said diffuser comprising a diffuser region, a hook element, at least a first nose element, a first connection region and a second connection region,

said first connection region being attached to said diffuser region, said first nose element being attached to said first connection region,

said second connection region being attached to said diffuser region, said hook element being attached to said second connection region,

said nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region,

at least a portion of said hook element extending farther in a third direction than said second connection region extends in a fourth direction, said third direction and said fourth direction each being perpendicular to a second axis which passes through at least a portion of each of said hook element and said second connection region, wherein if light passes through said diffuser region, said light would be diffused by passing through said diffuser region.

2. A diffuser as recited in claim 1, wherein a major dimension of said diffuser region extends in a first plane, said first plane being perpendicular to said first axis.

3. A diffuser as recited in claim 1, wherein said hook element extends around an entire periphery of said diffuser.

4. A diffuser as recited in claim 3, wherein said periphery is substantially circular.

5. A diffuser as recited in claim 1, wherein a surface of said diffuser region is substantially circular.

6. A diffuser as recited in claim 1, wherein said diffuser further comprises a second nose element, a third connection region, a third nose element and a fourth connection region, said third connection region extending from said diffuser region to said second nose element, said fourth connection region extending from said diffuser region to said third nose element.

7. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening; and

a diffuser, said diffuser comprising a diffuser region, at least a first nose element, a first connection region, a hook element and a second connection region,

said first connection region being attached to said diffuser region, said first nose element being attached to said first connection region,

said second connection region being attached to said diffuser region, said hook element being attached to said second connection region,

said nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region, said first nose element being positioned on an opposite side of said first opening relative to said first hook element, said first connection portion extending through said first opening,

at least a portion of said hook element extending farther in a third direction than said second connection region extends in a fourth direction, said third direction and said fourth direction each being perpendicular to a second axis which passes through at least a portion of each of said hook element and said second connection region,

wherein if light passes through said diffuser region, said light would be diffused by passing through said diffuser region.

8. A light fixture as recited in claim 7, wherein a major dimension of said diffuser region extends in a first plane, said first plane being perpendicular to said first axis.

9. A diffuser as recited in claim 7, wherein said hook element extends around an entire periphery of said diffuser.

10. A diffuser as recited in claim 9, wherein said periphery is substantially circular.

11. A light fixture as recited in claim 7, wherein a surface of said diffuser region is substantially circular.

12. A light fixture as recited in claim 7, wherein said diffuser further comprises a second nose element, a third connection region, a third nose element and a fourth connection region, said third connection region extending from said diffuser region to said second nose element, said fourth connection region extending from said diffuser region to said third nose element.

13. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening;

a diffuser; and

at least one accessory,

said diffuser comprising a diffuser region, at least a first nose element, a first connection region, a hook element and a second connection region, said diffuser comprising a first peripheral edge;

said first connection region being attached to said diffuser region, said first nose element being attached to said first connection region,

said second connection region being attached to said diffuser region, said hook element being attached to said second connection region,

said nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region, said first nose element being positioned on an opposite side of said first opening relative to said first hook element, said first connection portion extending through said first opening,

at least a portion of said hook element extending farther in a third direction than said second connection region extends in a fourth direction, said third direction and said fourth direction each being perpendicular to a second axis which passes through at least a portion of each of said hook element and said second connection region,

wherein if light passes through said diffuser region, said light would be diffused by passing through said diffuser region,

said accessory comprising a second peripheral edge and at least a first spring element, said first spring element being in a first position in which it extends away from said second peripheral edge when no pressure is applied to said first spring element, wherein if said accessory is pushed toward said diffuser such that a first region surrounded by said first peripheral edge of said diffuser at least partially overlaps a second region surrounded by said second peripheral edge of said accessory, said first spring element would be pushed toward said second peripheral edge due to contact between a first surface of said first spring element with said hook element, and if said accessory is pushed further, said first spring element would reach a position relative to said hook element where said first spring element can move at least partially back toward said first position such that a second surface of said first spring element would come into contact with said hook element, whereby said accessory would be held in place relative to said diffuser due to at least contact between said second surface of said first spring element and said hook element.

14. A light fixture as recited in claim 13, wherein said first spring element is biased to extend inward from said second peripheral edge when no pressure is applied to said first spring element, wherein if said accessory is pushed toward said diffuser such that said first region surrounded by said first peripheral edge of said diffuser at least partially overlaps said second region surrounded by said second peripheral edge of said accessory, said first spring element would be pushed outward toward said second peripheral edge due to contact between said first surface of said first spring element with said hook element, and if said accessory is pushed further, said first spring element would reach a position where it is no longer pushed outward by contact with said hook element, and said first spring element would return toward said first position, such that said first spring element would extend inward from said second peripheral edge and a second surface of said first spring element would be in contact with said hook element, whereby said accessory would be held in place relative to said diffuser due to at least contact between said second surface of said first spring element and said hook element.

15. A light fixture as recited in claim 13, wherein said first spring element is biased to extend outward from said second peripheral edge when no pressure is applied to said first spring element, wherein if said accessory is pushed toward said diffuser such that said first region surrounded by said first peripheral edge of said diffuser at least partially overlaps said second region surrounded by said second peripheral edge of said accessory, said first spring element would be pushed inward toward said second peripheral edge due to contact between said first surface of said first spring element with said hook element, and if said accessory is pushed further, said first spring element would reach a position where it is no longer pushed inward by contact with said hook element, and said first spring element would return toward said first position, such that said first spring element would extend outward from said second peripheral edge and a second surface of said first spring element would be in contact with said hook element, whereby said accessory would be held in place relative to said diffuser due to at least contact between said second surface of said first spring element and said hook element.

16. A light fixture as recited in claim 13, wherein said accessory is rotatable relative to said light engine housing.

17. A light fixture as recited in claim 13, wherein said first peripheral edge and said second peripheral edge are each substantially circular.

18. A light fixture as recited in claim 17, wherein said accessory is rotatable relative to said light engine housing about an axis extending through a center of a circle defined by said first peripheral edge.

19. A light fixture as recited in claim 14, wherein if said diffuser is positioned such that a first plane defined by a surface of said diffuser region is substantially level, said first spring element would be pushed in a direction which is substantially parallel to said first plane, and said accessory would be held in place relative to said diffuser as a result of at least gravitational force pulling said second surface of said first spring element toward said hook element.

20. A light fixture as recited in claim 14, wherein said first spring element comprises at least a third surface which is sloped such that said first spring element would be pushed outward or inward gradually as said accessory is pushed toward said diffuser such that said first region surrounded by said first peripheral edge of said diffuser would at least partially overlap a second region surrounded by said second peripheral edge of said accessory.

21. A light fixture as recited in claim 13, wherein said accessory comprises at least said first spring element, a second spring element and a third spring element.

22. A light fixture as recited in claim 13, wherein a surface of said diffuser region extends in a first plane, said first plane being perpendicular to said first axis.

23. A light fixture as recited in claim 13, wherein a surface of said diffuser region is substantially circular.

24. A light fixture as recited in claim 13, wherein said hook element extends around an entire periphery of said diffuser.

25. A light fixture as recited in claim 13, wherein said diffuser further comprises a second nose element, a third connection region, a third nose element and a fourth connection region, said third connection region extending from said diffuser region to said second nose element, said fourth connection region extending from said diffuser region to said third nose element.

26. A light fixture as recited in claim 13, wherein said accessory comprises a trim and an attachment ring, the attachment ring comprising at least a first element which engages said trim.

27. A light fixture structure, comprising:

a light engine housing, said light engine housing defining at least a first opening; and

at least a first attachment element,

said first attachment element comprising at least a first nose element, a hook element and a first connection region,

said first connection region extending from said first nose element to said hook element,

said first nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region, said first nose element being positioned on an opposite side of said first opening relative to said hook element, said first connection region extending through said first opening,

at least a portion of said hook element extending farther in a third direction than said first connection region extends in said second direction, said third direction also being perpendicular to said first axis.

28. A light fixture structure as recited in claim 27, wherein an edge of said hook element extends around an entire periphery of said attachment element, said periphery of said attachment element being substantially circular.

29. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening;

a diffuser, said diffuser comprising a diffuser region; and

at least a first attachment element,

said first attachment element comprising at least a first nose element, a hook element and a first connection region, said first connection region extending from said first nose element to said hook element,

said first nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region, said first nose element being positioned on an opposite side of said first opening relative to said hook element, said first connection region extending through said first opening,

at least a portion of said hook element extending farther in a third direction than said first connection region extends in said second direction, said third direction also being perpendicular to said first axis,

at least a first surface of said diffuser being in contact with a portion of said hook element,

wherein if light passes through said diffuser region, said light would be diffused by passing through said diffuser region.

30. A light fixture as recited in claim 29, wherein a major dimension of said diffuser region extends in a first plane, said first plane being perpendicular to said first axis.

31. A light fixture as recited in claim 29, wherein an edge of said hook element extends around an entire periphery of said attachment element, said periphery of said attachment element being substantially circular.

32. A light fixture as recited in claim 29, wherein a surface of said diffuser region is substantially circular.

33. A light fixture as recited in claim 29, wherein said attachment element comprises at least said nose element, a second nose element and a third nose element.

34. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening;

a diffuser;

at least a first attachment element; and

at least one accessory,

said diffuser comprising a diffuser region,

said first attachment element comprising at least a first nose element, a hook element and a first connection region, said first connection region extending from said first nose element to said hook element, said first attachment element comprising a first peripheral edge;

said first nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region, said first nose element being positioned on an opposite side of said first opening relative to said hook element, said first connection region extending through said first opening,

at least a portion of said hook element extending farther in a third direction than said first connection region extends in said second direction, said third direction also being perpendicular to said first axis,

at least a first surface of said diffuser being in contact with a first portion of said hook element,

wherein if light passes through said diffuser region, said light would be diffused by passing through said diffuser region,

said accessory comprising a second peripheral edge and at least a first spring element,

said accessory being held in place relative to said diffuser by at least said first spring element,

said accessory being of a shape such that if said accessory were not engaged with said diffuser, said first spring element would be in a first position in which it extends away from said second peripheral edge when no pressure is applied to said first spring element, wherein if said accessory is pushed toward said attachment element such that a first region surrounded by said first peripheral edge of said attachment element at least partially overlaps a second region surrounded by said second peripheral edge of said accessory, said first spring element would be pushed toward said second peripheral edge due to contact between a first surface of said first spring element with said hook element, and if said accessory is pushed further, said first spring element would reach a position relative to said hook element where said first spring element can move at least partially back toward said first position such that a second surface of said first spring element would come into contact with said hook element, whereby said accessory would be held in place relative to said attachment element due to at least contact between said second surface of said first spring element and said hook element.

35. A light fixture as recited in claim 34, wherein said first spring element is biased to extend inward from said second peripheral edge when no pressure is applied to said first spring element, wherein if said accessory is pushed toward said attachment element such that a first region surrounded by said first peripheral edge of said attachment element at least partially overlaps a second region surrounded by said second peripheral edge of said accessory, said first spring element would be pushed outward toward said second peripheral edge due to contact between said first surface of said first spring element with said hook element, and if said accessory is pushed further, said first spring element would reach a position where it is no longer pushed outward by contact with said hook element, and said first spring element would return toward said first position, such that said first spring element would extend inward from said second peripheral edge and a second surface of said first spring element would be in contact with said hook element, whereby said accessory would be held in place relative to said attachment element due to at least contact between said second surface of said first spring element and said hook element.

36. A light fixture as recited in claim 34, wherein said first spring element is biased to extend outward from said second peripheral edge when no pressure is applied to said first spring element, wherein if said accessory is pushed toward said attachment element such that said first peripheral edge of said attachment element passes through said second peripheral edge of said accessory, said first spring element would be pushed inward toward said second peripheral edge due to contact between said first surface of said first spring element with said hook element, and if said accessory is pushed further, said first spring element would reach a position where it is no longer pushed inward by contact with said hook element, and said first spring element would return toward said first position, such that said first spring element would extend outward from said second peripheral edge and a second surface of said first spring element would be in contact with said hook element, whereby said accessory would be held in place relative to said attachment element due to at least contact between said second surface of said first spring element and said hook element.

37. A light fixture as recited in claim 34, wherein said accessory is rotatable relative to said light engine housing.

38. A light fixture as recited in claim 34, wherein said first spring element comprises at least a third surface which is sloped such that said first spring element would be pushed gradually as said accessory is pushed toward said attachment element such that said first region surrounded by said first peripheral edge of said attachment element at least partially overlaps said second region surrounded by said second peripheral edge of said accessory.

39. A light fixture as recited in claim 34, wherein said accessory comprises at least said first spring element, a second spring element and a third spring element.

40. A light fixture as recited in claim 34, wherein a first plane defined by said first peripheral edge of said attachment element is substantially perpendicular to said first axis.

41. A light fixture as recited in claim 40, wherein said first peripheral edge of said attachment element is substantially circular.

42. An eyeball accessory for a light fixture, comprising:

a first eyeball housing element; and

a second eyeball housing element,

said first eyeball housing element having a first peripheral edge,

said second eyeball housing element having a second peripheral edge, said second peripheral edge being positioned within said first eyeball housing element,

at least a first portion of said first peripheral edge being pivotally attached to a second portion of said second eyeball housing element at a first location, whereby said second eyeball housing element is pivotable relative to said first eyeball housing element along a first line which passes through said first location,

said first eyeball housing element having at least a first inner surface, said first eyeball housing element comprising at least a first surface irregularity on said first inner surface;

said second eyeball housing element having at least a first outer surface, said second eyeball housing element comprising at least a second surface irregularity on said first outer surface, said first surface irregularity being engageable with said second surface irregularity, wherein if said first surface irregularity is engaged with said second surface irregularity, said second eyeball housing element would be inhibited from pivoting relative to said first eyeball housing element.

43. An eyeball accessory as recited in claim 42, wherein said first surface irregularity comprises a protrusion.

44. An eyeball accessory as recited in claim 43, wherein said second surface irregularity comprises a recess.

45. An eyeball accessory as recited in claim 42, wherein said first surface irregularity comprises a recess.

46. An eyeball accessory as recited in claim 45, wherein said second surface irregularity comprises a protrusion.

47. An eyeball accessory as recited in claim 42, wherein said first eyeball housing element comprises a plurality of surface irregularities on said first inner surface, whereby said second surface irregularity can be engaged with any of said plurality of surface irregularities on said first inner surface by orienting said second eyeball housing in any of a plurality of corresponding pivot positions relative to said first eyeball housing, and said second eyeball housing element would be inhibited from pivoting relative to said first eyeball housing element away from any of said rotational positions by engagement between said second surface irregularity and a corresponding one of said surface irregularities on said first inner surface.

48. An eyeball accessory as recited in claim 47, wherein said plurality of surface irregularities on said first inner surface are aligned along a second line which is substantially perpendicular to said first line, whereby said second housing can be pivoted relative to said first housing and moved among said pivot positions in a ratcheting motion.

49. An eyeball accessory as recited in claim 42, wherein said second eyeball housing element comprises a plurality of surface irregularities on said first outer surface, whereby said first surface irregularity can be engaged with any of said plurality of surface irregularities on said first outer surface by orienting said second eyeball housing in any of a plurality of corresponding pivot positions relative to said first eyeball housing, and said second eyeball housing element would be inhibited from rotating relative to said first eyeball housing element away from any of said pivot positions due to engagement between said first surface irregularity and a corresponding one of said surface irregularities on said first outer surface.

50. An eyeball accessory as recited in claim 49, wherein said plurality of surface irregularities on said first outer surface are aligned along a third line which is substantially perpendicular to said first line, whereby said second housing can be pivoted relative to said first housing and moved among said pivot positions in a ratcheting motion.

51. An eyeball accessory as recited in claim 42, wherein said eyeball accessory further comprises at least a first reflector positioned on an inside surface of said first eyeball housing element and a second reflector positioned on an inside surface of said second eyeball housing element.

52. An eyeball accessory as recited in claim 42, wherein said eyeball accessory further comprises an eyeball accessory diffuser positioned within a peripheral interior surface of said first eyeball housing element or said second eyeball housing element, said eyeball accessory diffuser having a peripheral external edge, said eyeball accessory diffuser comprising at least one diffuser retention member extending from said peripheral external edge, said diffuser retention member being in contact with at least one diffuser contact member extending from said peripheral interior surface of said first eyeball housing element or said second eyeball housing element.

53. An eyeball accessory as recited in claim 52, wherein said diffuser contact member comprises at least two holding members positioned on opposite sides of said diffuser retention member, said holding members inhibiting said eyeball accessory diffuser from rotating relative to said first eyeball housing element or said second eyeball housing element about an axis of said eyeball accessory diffuser.

54. An eyeball accessory for a light fixture, comprising:

a first eyeball housing element; and

a second eyeball housing element,

said first eyeball housing element having a first peripheral edge,

said second eyeball housing element having a second peripheral edge, said second peripheral edge being positioned within said first eyeball housing element,

said first eyeball housing element having at least a first inner surface, said first eyeball housing element comprising at least a first surface irregularity on said first inner surface;

said second eyeball housing element having at least a first outer surface, said second eyeball housing element comprising at least a second surface irregularity on said first outer surface, wherein said eyeball accessory can be oriented such that said second surface irregularity engages said first surface irregularity, said second eyeball housing element being pivotable relative to said first eyeball housing element in a direction along a first line which passes through said first surface irregularity.

55. An eyeball accessory as recited in claim 54, wherein said first surface irregularity comprises a protrusion.

56. An eyeball accessory as recited in claim 55, wherein said second surface irregularity comprises a recess.

57. An eyeball accessory as recited in claim 54, wherein said first surface irregularity comprises a recess.

58. An eyeball accessory as recited in claim 57, wherein said second surface irregularity comprises a protrusion.

59. An eyeball accessory as recited in claim 54, wherein said eyeball accessory can be oriented such that said second surface irregularity is pressed against said first surface irregularity by gravitational force and said second eyeball housing element is pivotable relative to said first eyeball housing element along a first line which passes through said first surface irregularity.

60. An eyeball accessory as recited in claim 54, wherein said first peripheral edge and said second peripheral edge are each substantially circular, and said first line extends tangentially relative to said second peripheral edge.

61. An eyeball accessory as recited in claim 54, wherein said first inner surface of said first eyeball housing element has a first complementary surface structure and said first outer surface of said second eyeball housing element has a second complementary surface structure, said first complementary surface structure and said second complementary surface structure staying in contact and sliding relative to one another if said second eyeball housing element is rotated relative to said first eyeball housing element along said first line.

62. An eyeball accessory as recited in claim 61, wherein:

at least a portion of said first inner surface is substantially in a shape of a partial cylinder, said first complementary surface comprises a first contour surface which extends from said first inner surface to a larger extent in a first region than in a second region, the first region being closer to said first peripheral edge than said second region, and

said second complementary surface comprises a second contour surface which is rounded, whereby if said second eyeball housing element is rotated relative to said first eyeball housing element along said first line, different portions of said rounded second contour surface would come into contact with said first contour surface.

63. An eyeball accessory as recited in claim 62, wherein said second contour surface is substantially in a shape of an oblong cylinder

64. An eyeball accessory as recited in claim 54, wherein said eyeball accessory further comprises at least a first reflector positioned on an inside surface of said first eyeball housing element and a second reflector positioned on an inside surface of said second eyeball housing element.

65. An eyeball accessory as recited in claim 54, wherein said eyeball accessory further comprises an eyeball accessory diffuser positioned within a peripheral interior surface of said first eyeball housing element or said second eyeball housing element, said eyeball accessory diffuser having a peripheral external edge, said eyeball accessory diffuser comprising at least one diffuser retention member extending from said peripheral external edge, said diffuser retention member being in contact with at least one diffuser contact member extending from said peripheral interior surface of said first eyeball housing element or said second eyeball housing element.

66. An eyeball accessory as recited in claim 65, wherein said diffuser contact member comprises at least two holding members positioned on opposite sides of said diffuser retention member, said holding members inhibiting said eyeball accessory diffuser from rotating relative to said first eyeball housing element or said second eyeball housing element about an axis of said eyeball accessory diffuser.

67. An accessory for a light fixture, said accessory comprising:

at least a first housing member, said first housing member having an accessory peripheral edge and at least a first spring element, said first spring element being biased to a rest position where a portion of said first spring element extends away from said accessory peripheral edge when no pressure is applied to said first spring element, said accessory peripheral edge defining an internal area,

wherein if a force is applied to said first spring element to push said first spring element outward toward said accessory peripheral edge, and if said force were then removed, said first spring element would flex back toward said rest position.

68. An accessory as recited in claim 67, wherein said first spring element is biased to a rest position where a portion of said first spring element extends inward from said accessory peripheral edge when no pressure is applied to said first spring element,

wherein if a force is applied to said first spring element to push said first spring element outward relative to said internal area, said first spring element would flex outward toward said accessory peripheral edge, and if said force were removed, said first spring element would flex back toward said rest position.

69. An accessory as recited in claim 67, wherein said first spring element is biased to a rest position where a portion of said first spring element extends outward from said accessory peripheral edge when no pressure is applied to said first spring element,

wherein if a force is applied to said first spring element to push said first spring element inward relative to said internal area, said first spring element would flex inward toward said accessory peripheral edge, and if said force were removed, said first spring element would flex back toward said rest position.

70. An accessory as recited in claim 67, wherein said accessory peripheral edge is in a shape of a circle with at least one gap.

71. An accessory as recited in claim 67, wherein said accessory comprises at least said first spring element, a second spring element and a third spring element.

72. An accessory as recited in claim 67, wherein said accessory comprises a trim and an attachment ring, the attachment ring comprising at least a first element which engages said trim.

73. An accessory for a light fixture, said accessory comprising:

at least a first housing member, said first housing member having an accessory peripheral edge and at least a first spring element, said accessory peripheral edge being in a shape of a circle with at least one gap, said first spring element being in a first position in which it extends away from said accessory peripheral edge when no pressure is applied to said first spring element, said accessory peripheral edge defining an internal area,

wherein if;

(1) said accessory is pushed toward a light fixture which comprises a fixture peripheral edge comprising at least a first substantially circular region and a second substantially circular region, said first substantially circular region having a diameter such that it would fit snugly with said accessory peripheral edge, said second substantially circular region having a diameter which differs from a diameter of said first substantially circular region, and said first substantially circular region comprising an axis which is substantially coaxial with an axis of said second substantially circular region, and

(2) while said accessory is being pushed toward said light fixture, an axis of said accessory peripheral edge remains substantially coaxial with said axis of said first substantially circular region, and said accessory peripheral edge first becomes concentric with said first substantially circular region and then with said second substantially circular region,

said first spring element would be pushed toward said accessory peripheral edge due to contact between a first surface of said first spring element with said first substantially circular region, and then

said first spring element would reach a position relative to said first substantially circular region where said first spring element can move at least partially back toward said first position, such that

(1) said first spring element would extend away from said accessory peripheral edge, and

(2) a second surface of said first spring element would be in contact with said first substantially circular region,

whereby said accessory would be held in place relative to said light fixture due to at least contact between said second surface of said first spring element and said first substantially circular region.

74. An accessory as recited in claim 73, wherein said first spring element is biased to extend inward from said accessory peripheral edge when no pressure is applied to said first spring element.

75. An accessory as recited in claim 73, wherein said first spring element is biased to extend outward from said accessory peripheral edge when no pressure is applied to said first spring element.

76. An accessory as recited in claim 73, wherein said first spring element comprises at least a third surface which is sloped such that said first spring element would be pushed outward gradually as said accessory is pushed toward said light fixture such that said fixture peripheral edge would pass through said first substantially circular region of said accessory.

77. An accessory as recited in claim 73, wherein said accessory comprises at least said first spring element, a second spring element and a third spring element.

78. An accessory as recited in claim 73, wherein said accessory comprises a trim and an attachment ring, the attachment ring comprising at least a first element which engages said trim.

79. A diffuser for a lighting device, said diffuser comprising a diffuser region and means for attaching said diffuser to a light fixture.

80. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening; and

a diffuser, said diffuser comprising means for attaching said diffuser to a light fixture.

81. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening;

a diffuser; and

at least one accessory,

said diffuser comprising a diffuser region, means for attaching said diffuser to said light engine housing, and means for holding said accessory,

said accessory comprising means for engaging said means for holding said accessory.

82. A light fixture structure, comprising:

a light engine housing, said light engine housing defining at least a first opening; and

at least a first attachment element, said first attachment element comprising means for attaching said attachment element to said light engine housing and means for holding a diffuser.

83. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening; and

at least a first attachment element, said first attachment element comprising means for attaching said attachment element to said light engine housing, means for holding a diffuser, and means for holding an accessory.

84. An eyeball accessory for a light fixture, comprising:

a first eyeball housing element;

a second eyeball housing element; and

means for allowing said first eyeball housing element to pivot relative to said second eyeball housing element.

85. An accessory for a light fixture, said accessory comprising:

at least a first housing member, said first housing member comprising means for engaging a light fixture which comprises a fixture peripheral edge comprising at least a first substantially circular region and a second substantially circular region

86. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening;

a diffuser;

an attachment ring; and

a trim,

said diffuser comprising a diffuser region, at least a first nose element, a first connection region, a diffuser hook element and a second connection region, said diffuser comprising a first peripheral edge;

said first connection region being attached to said diffuser region, said first nose element being attached to said first connection region,

said second connection region being attached to said diffuser region, said diffuser hook element being attached to said second connection region,

said nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region, said first nose element being positioned on an opposite side of said first opening relative to said diffuser hook element, said first connection portion extending through said first opening,

at least a portion of said diffuser hook element extending farther in a third direction than said second connection region extends in a fourth direction, said third direction and said fourth direction each being perpendicular to a second axis which passes through at least a portion of each of said diffuser hook element and said second connection region,

wherein if light passes through said diffuser region, said light would be diffused by passing through said diffuser region,

said attachment ring comprising a first set of spring elements and a second set of spring elements, said first set of spring elements engaging said diffuser hook element;

said trim comprising a trim hook element, said second set of spring elements engaging said trim hook element.

87. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening;

a diffuser; and

an attachment ring,

said diffuser comprising a diffuser region, at least a first nose element, a first connection region, a diffuser hook element and a second connection region, said diffuser comprising a first peripheral edge;

said first connection region being attached to said diffuser region, said first nose element being attached to said first connection region,

said second connection region being attached to said diffuser region, said diffuser hook element being attached to said second connection region,

said nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region, said first nose element being positioned on an opposite side of said first opening relative to said diffuser hook element, said first connection portion extending through said first opening,

at least a portion of said diffuser hook element extending farther in a third direction than said second connection region extends in a fourth direction, said third direction and said fourth direction each being perpendicular to a second axis which passes through at least a portion of each of said diffuser hook element and said second connection region,

wherein if light passes through said diffuser region, said light would be diffused by passing through said diffuser region,

said attachment ring comprising a first set of spring elements and a second set of spring elements, said first set of spring elements engaging said diffuser hook element;

at least a first spring element of said second set of spring elements being in a first position in which it extends away from a peripheral edge of said attachment ring when no pressure is applied to said first spring element, wherein if a trim which has a circumferential trim hook element is pushed toward said attachment ring such that a first region surrounded by said first peripheral edge of said attachment ring at least partially overlaps a second region surrounded by a peripheral edge of said trim, said first spring element would be pushed toward said second peripheral edge due to contact between a first surface of said first spring element with said trim hook element, and if said trim is pushed further, said first spring element would reach a position relative to said trim hook element where said first spring element can move at least partially back toward said first position such that a second surface of said first spring element would come into contact with said trim hook element, whereby said trim would be held in place relative to said diffuser due to at least contact between said second surface of said first spring element and said trim hook element.

88. A light fixture, comprising:

a light engine housing, said light engine housing defining at least a first opening;

a diffuser;

an attachment element;

an attachment ring; and

a trim,

said diffuser comprising a diffuser region,

said first attachment element comprising at least a first nose element, an attachment element hook element and a first connection region, said first connection region extending from said first nose element to said attachment element hook element, said first attachment element comprising a first peripheral edge;

said first nose element extending farther in a first direction than said first connection region extends in a second direction, said first direction being parallel to said second direction, said first direction and said second direction each being perpendicular to a first axis which passes through at least a portion of each of said first nose element and said first connection region, said first nose element being positioned on an opposite side of said first opening relative to said attachment element hook element, said first connection region extending through said first opening,

at least a portion of said attachment element hook element extending farther in a third direction than said first connection region extends in said second direction, said third direction also being perpendicular to said first axis,

at least a first surface of said diffuser being in contact with a first portion of said attachment element hook element,

wherein if light passes through said diffuser region, said light would be diffused by passing through said diffuser region,

said attachment ring comprising a first set of spring elements and a second set of spring elements, said first set of spring elements engaging said attachment element hook element;

at least a first spring element of said second set of spring elements being in a first position in which it extends away from a peripheral edge of said attachment ring when no pressure is applied to said first spring element, wherein if a trim which has a circumferential trim hook element is pushed toward said attachment ring such that a first region surrounded by said first peripheral edge of said attachment ring at least partially overlaps a second region surrounded by a peripheral edge of said trim, said first spring element would be pushed toward said second peripheral edge due to contact between a first surface of said first spring element with said trim hook element, and if said trim is pushed further, said first spring element would reach a position relative to said trim hook element where said first spring element can move at least partially back toward said first position such that a second surface of said first spring element would come into contact with said trim hook element, whereby said trim would be held in place relative to said attachment ring due to at least contact between said second surface of said first spring element and said trim hook element.