Florissant, MO Outdoor Lighting: Billboard Lighting (2026)

280 governs "standard outdoor advertising structures," the City's term for billboards, and folds lighting standards in alongside height and separation rules. Subsection (B) bars any revolving or rotating beam or beacon that simulates an emergency light, and prohibits flashing, intermittent or moving lights on the sign itself, with a narrow carve-out for scoreboards and public-service displays showing time, date or temperature. Subsection (C) permits external lighting such as floodlights, thin-line and gooseneck reflectors, but only if the light source is aimed at the sign face and effectively shielded so no beam reaches the main traveled way of the interstate or primary highway the billboard is meant to be read from, and so it does not glare into a driver's eyes or spill onto adjacent residential property; an externally lit billboard cannot be located within 800 feet of any residential property.

Subsection (D) separately bars any standard outdoor advertising structure from being illuminated in a way that interferes with or obscures an official traffic sign, device or signal. These lighting rules apply on top of the structure's required Special Use Permit, which must include a site plan showing landscaping, lighting and fencing reviewed by the Planning and Zoning Commission before a building permit issues.