Lighting apparatus capable of providing auxiliary and emergency illumination
First Claim
1. A lighting apparatus comprising:
- a primary power supply adapted to be connected electrically to an electrical outlet;
a primary lighting unit connected to said primary power supply and including at least one high-power lamp;
a control unit connected to said primary power supply and said primary lighting unit and operable so as to control activation of said primary lighting unit;
a secondary lighting unit connected to said control unit and including at least one low-power high-intensity light source;
a light sensor connected to said control unit and generating a light signal corresponding to intensity of ambient light; and
a back-up power supply connected to said control unit;
said control unit enabling operation of said secondary lighting unit when said primary lighting unit is deactivated and the light signal from said light sensor indicates a poor ambient light condition;
said control unit further enabling supply of power from said back-up power supply to said secondary lighting unit to permit activation of said secondary lighting unit when power failure of said primary power supply occurs.
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Accused Products
Abstract
A lighting apparatus includes a primary power supply, a primary lighting unit, a control unit, a secondary lighting unit, a light sensor, and a back-up power supply. The control unit is connected to the primary power supply, the primary lighting unit, the secondary lighting unit, the light sensor and the back-up power supply. The primary lighting unit includes at least one high-power lamp controlled by the control unit. The secondary lighting unit includes at least one low-power high-intensity light source. The light sensor generates a light signal corresponding to intensity of ambient light. The control unit enables operation of the secondary lighting unit when the primary lighting unit is deactivated during poor ambient light conditions, and further enables supply of power from the back-up power supply to the secondary lighting unit to activate the latter when power failure of the primary power supply occurs.
21 Citations
11 Claims
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1. A lighting apparatus comprising:
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a primary power supply adapted to be connected electrically to an electrical outlet;
a primary lighting unit connected to said primary power supply and including at least one high-power lamp;
a control unit connected to said primary power supply and said primary lighting unit and operable so as to control activation of said primary lighting unit;
a secondary lighting unit connected to said control unit and including at least one low-power high-intensity light source;
a light sensor connected to said control unit and generating a light signal corresponding to intensity of ambient light; and
a back-up power supply connected to said control unit;
said control unit enabling operation of said secondary lighting unit when said primary lighting unit is deactivated and the light signal from said light sensor indicates a poor ambient light condition;
said control unit further enabling supply of power from said back-up power supply to said secondary lighting unit to permit activation of said secondary lighting unit when power failure of said primary power supply occurs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification