O'Fallon, MO Outdoor Lighting: Light Trespass & Shielding (2026)

277 exists, per its purpose clause in subsection A, to regulate the spill-over of light and glare onto motorists, pedestrians and nearby land uses, and to prevent the nuisances that spill-over light creates. Subsection D(2) puts a hard number on that goal for property lines: illumination attributable to a private exterior lighting fixture cannot exceed one-half of one foot-candle as measured at the property line, regardless of the source's location on the lot. Where the property is zoned commercial or industrial and lighting is designed to extend toward the public right-of-way, the Code sets a separate band for the strip between the property line and the road: at least four-tenths of a foot-candle must reach the curb or shoulder, but no more than seven-tenths of a foot-candle can spill onto the paved road surface itself, and the fixture must be designed to project downward so it does not impair a driver's vision.

Every fixture subject to these limits must also be shown, with its intensity of illumination, on the photometric plan submitted for site plan review under Article XIV, giving the Planning and Development Department a documented check before a new commercial or industrial development is ever built and lit.