Lighting system having a multi-light source collimator and method of operating such
First Claim
1. A method of determining efficacy of one or more light sources in a luminaire housing for a given set of operating conditions comprising:
- a. thermally characterizing the luminaire housing for effectiveness as a heat sink comprising determining a housing temperature for the given set of operating conditions based on one or more of;
i. a physical dimension of at least a portion of the luminaire housing;
ii. a property of one or more materials from which the luminaire housing is comprised;
iii. the number of light sources in the luminaire housing;
iv. a thermal property of a light source in the luminaire housing; and
v. spacing between at least some of the light sources in the luminaire housing;
b. determining one or more light source output degradation factors for the one or more light sources at the given set of operating conditions based, at least in part, on (i) a measured light output of said one or more light sources at one or more operating conditions, and (ii) the thermal characterization of the luminaire housing or a deviation between the light output measurements and a reference data at the given set of operating conditions; and
c. predicting actual light output and/or efficacy of the one or more light sources at the operating conditions based on (i) the thermal characterization of the luminaire housing, (ii) a rated efficacy of the one or more light sources, and (iii) the one or more degradation factors.
1 Assignment
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Accused Products
Abstract
A lens is provided which is elongated along an axis so to accommodate a linear array of LEDs, the elongation of the lens resulting in a corresponding elongation of the beam output pattern; in practice, the axis of elongation may be oriented so to suit a target area or some portion thereof. A methodology is provided for use with said lens so to evaluate various factors such as droop, heat management, and light output for a given combination of light sources and luminaire design. Alternative designs of lens, as well as alternative optical devices, are also presented for use with said methodology.
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Citations
19 Claims
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1. A method of determining efficacy of one or more light sources in a luminaire housing for a given set of operating conditions comprising:
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a. thermally characterizing the luminaire housing for effectiveness as a heat sink comprising determining a housing temperature for the given set of operating conditions based on one or more of; i. a physical dimension of at least a portion of the luminaire housing; ii. a property of one or more materials from which the luminaire housing is comprised; iii. the number of light sources in the luminaire housing; iv. a thermal property of a light source in the luminaire housing; and v. spacing between at least some of the light sources in the luminaire housing; b. determining one or more light source output degradation factors for the one or more light sources at the given set of operating conditions based, at least in part, on (i) a measured light output of said one or more light sources at one or more operating conditions, and (ii) the thermal characterization of the luminaire housing or a deviation between the light output measurements and a reference data at the given set of operating conditions; and c. predicting actual light output and/or efficacy of the one or more light sources at the operating conditions based on (i) the thermal characterization of the luminaire housing, (ii) a rated efficacy of the one or more light sources, and (iii) the one or more degradation factors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification