Fremont, CA Outdoor Lighting: Light Trespass & Shielding (2026)

430 sets the city's lighting standards for all signs and is the operative light-trespass rule reachable from the sign chapter. Subsection (a) bans flashing, blinking signs or any sign emitting a varying intensity of light or color. Subsection (b), "Light Sources," requires light sources to be concealed or shielded to prevent or minimize light spillage, glare, momentary blindness, or annoyance to people of ordinary sensibilities near the fixture, and goes further for residential proximity: signs illuminated adjacent to any residential area must be shielded to direct light downward and away from adjacent properties so there is no spillover light, and must be controlled by a rheostat or functional equivalent to avoid excessive glare onto residential properties.

Subsection (c), "Light Intensity," flatly prohibits illumination so bright that the primary light source is visible beyond the property line, and gives the city authority to conduct a post-installation inspection; if illumination is found to adversely impact adjacent properties, the city can require the owner to reduce or adjust the sign's brightness to match surrounding ambient light, and that intensity restriction can vary by time of day. Subsection (d) separately requires zoning administrator sign-off before exposed light sources such as neon tubing or unshielded bulbs get final approval, based on a finding that the light does not cause unreasonable glare to passersby or neighbors, though that inquiry is limited to the physical lighting method and excludes message content. The section notes it does not apply to digital signs, which are separately governed by Sec. 450.