The following requirements apply to illuminated signs including signs illuminated by spotlights or other lamps off the sign:
- (1) The light source shall be constant. Flashing, rotating or alternating lamps may not be used.
- (2) The sign lighting shall contain a separate fusing device unless the power source is other than a vehicle lighting circuit.
- (3) No sign lighting may contain any type of prismatic lens designed to direct or focus the lamp ray in any direction.
- (4) No red lamp may be visible through an area of 180° of the front of the sign.
- (5) No sign lighting may display a beam of light visible to the rear of the sign. The arrangement of lamps shall be such that it is not possible to look directly into a lamp from a vehicle following at 50 feet within an arc ranging from 45° right to 45° left.
Source
The provisions of this § 155.3 adopted August 26, 1977, effective August 27, 1977, 7 Pa.B. 2428; renumbered May 15, 1981, effective May 16, 1981, 11 Pa.B. 1678; amended February 18, 1983, effective February 19, 1983, 13 Pa.B. 783; readopted January 8, 1988, effective January 9, 1988, 18 Pa.B. 190. Immediately preceding text appears at serial page (80036).