Outdoor Lighting in Florissant, MO (2026)
3 verified outdoor lighting rules for Florissant, Missouri, sourced directly from the municipal code and official government pages.
Verified from official government sources
Dark Sky Rules
Florissant's Section 405.251, adopted by Ordinance No. 9109 on September 22, 2025, requires new and replacement outdoor light fixtures in business, industrial, and commercial-use residential districts to be fully shielded so no light shows above the horizontal plane. Parking lot fixtures must use a flat lens fully enclosing the lamp unless the Planning and Zoning Commission approves a decorative alternative that meets strict glare limits.
Florissant Outdoor Lighting Shielding Rules
Some RestrictionsFlorissant Code of Ordinances § 405.251
FULLY SHIELDED A luminaire constructed and installed so that all light emitted is projected below a horizontal plane through the lowest light-emitting part of the fixture, with no direct light visible above horizontal. ... Parking lot lighting shall be fully shielded with flat lens enclosed within the light fixture, except that the Planning and Zoning Commission may approve decorative light fix...
Light Trespass & Shielding
Florissant's Section 405.251 caps how much light can spill past a lot line: fixtures may not exceed 0.1 foot-candle on adjacent "R," "NU" or "A" district land or on the public right-of-way, and parking lot lighting is capped at 0.5 foot-candle of off-site glare measured at the property line. All fixtures need an 85-degree cut-off angle.
Florissant Light Trespass Property Line Limits
Some RestrictionsFlorissant Code of Ordinances § 405.251
All illumination structures, except for approved streetlights, shall maintain a cut-off angle of not greater than eighty-five degrees (85°) and shall be so arranged as not to cause light greater than one-tenth (0.1) foot-candles on any public right-of-way or on adjacent properties in the "NU" Non-Urban District, "A" Recreational District, or any "R" Residence District. ... There will be no off-...
Billboard Lighting
Florissant bans rotating beacons and flashing lights on standard outdoor advertising structures and requires any external floodlights to be shielded so beams never hit the highway travel lane or spill onto adjacent residential property. An externally lit billboard cannot sit within 800 feet of a residential lot, and no billboard may obscure an official traffic signal.
Florissant Billboard Lighting Restrictions
Some RestrictionsFlorissant Code of Ordinances § 520.280(B)-(D)
No revolving or rotating beam or beacon of light that simulates any emergency light or device shall be permitted as part of any sign. No flashing, intermittent or moving light or lights will be permitted except scoreboards and other illuminated signs designating public service information, such as time, date or temperature or similar information. ... External lighting, such as floodlights, thin...
Looking for St. Louis County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Florissant city rules.
Outdoor Lighting in St. Louis County →