Importance

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Abstract

A lighting device (32) is provided to illuminate indicia (18) of an EXIT sign (10) having a sign housing (12) defining an enclosure (22) therein and having a primary electrical power source. The lighting device is provided with a reflector (40) having a shallow V-shaped contour (43,44,45) defining a centrally located valley in the reflector and a source of illumination (42) positioned in the valley of the reflector and powered by the primary power source, the source of illumination including two rows of LEDs (65), each row having a plurality of LEDs, and the rows being separated from one another and positioned on either side of the valley. The LEDs are positioned on either side of the valley (44,45) a sufficient distance from the valley to illuminate the edges of the sign parallel to the valley while preventing areas within the valley from having dark and/or unilluminated spots. The rows of LEDs are mounted on opposite edges of a printed circuit board (70) positioned in the valley of the reflector. A side of the printed circuit (72) board facing the indicia to be illuminated is coated with a reflective material. A modular power supply (36) is provided for attachment to a rear side of the reflector (87) above or below a center line (88) perpendicular to the valley. The modular power supply (36) provides a primary source of power (97), and may also include an emergency electrical power supply (107).

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First Claim