Internally or externally illuminated signs shall meet the following requirements.
(A) Signs shall be illuminated only by steady, stationary, shielded, or shaded light sources directed solely at the sign, or internal to it so the light intensity or brightness does not create either a nuisance to adjacent property or a traffic hazard for motorist or pedestrians. No sign shall be illuminated at a light level that exceeds 2,500 Lambert.
(B) Except where a combination of individual exposed bulbs displays information, such as time, temperature, or date illuminated signs, no exposed reflective-type bulb and no strobe light or unshielded incandescent lamp shall be used on the exterior surface of any sign.
(Prior Code, 7 TCC 1-20(k))