§ 155.3. Design.
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).
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