2 county-level rules, plus city-specific rules for 1 city in Lehigh County, Pennsylvania.
Verified from official government sources
Allentown has no formal dark-sky ordinance, but its zoning code requires all light sources to be diffused so the bulb is not directly visible from streets, sidewalks, dwellings, or adjacent lots. Flashing and strobe lighting are banned except seasonal holiday lights (Oct 25–Jan 10).
Allentown Zoning Ordinance §1317.02.K.2
All light sources, including signs, shall be properly diffused with a translucent or similar cover to prevent the lighting element from being directly visible from streets, public sidewalks, dwellings or adjacent lots.
Allentown zoning requires all light sources, including signs, to be shielded and aimed so they do not create a nuisance for neighbors or shine into passing motorists' eyes. Parking-lot lighting must also be shielded to protect adjacent residential areas from glare.
Allentown Zoning Ordinance §1317.02.K.3
All light sources, including signs, shall be shielded around the light source and directed and placed to prevent the lighting from creating a nuisance to persons in adjacent dwellings or undeveloped residentially zoned areas, and to prevent the lighting from shining into the eyes of passing motorists.
1 cities in Lehigh County have their own outdoor lighting rules. Each link goes to that city's dedicated page with code citations.
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