Florissant, MO Outdoor Lighting: Light Trespass & Shielding (2026)

251(F) set the trespass ceiling for every outdoor fixture covered by the ordinance except approved streetlights: each fixture's cut-off angle cannot exceed eighty-five degrees, and the arrangement cannot cause more than one-tenth of a foot-candle of light on any public right-of-way or on land zoned "NU" Non-Urban, "A" Recreational, or any "R" Residence District. Parking lot lighting gets its own, higher ceiling because it typically sits closer to a lot line: fixtures must be fully shielded with a flat lens, and if the Planning and Zoning Commission approves a decorative alternative it can only do so after a photometric plan shows off-site glare will not exceed five-tenths of a foot-candle measured at the property line.

A companion table in the same subsection sets the maximum illumination allowed in the plane of any property line: five-tenths of a foot-candle where the line adjoins a commercial or industrial district, one-tenth of a foot-candle where it adjoins "R," "NU" or "A" zoned property, up to eight foot-candles five feet from the base of a light standard, and up to twenty-two foot-candles under a canopy. Anyone proposing exterior lighting changes on a site plan must submit a lighting plan with a photometric layout demonstrating compliance, reviewed by the Director of Public Works, and any later change to an approved fixture or light source needs its own compliance submittal before installation. or one hour after the activity ends, whichever is later.