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

04(B) of the Lighting and Glare chapter names light trespass directly, defining it as unwanted light on adjacent lots and public rights-of-way, and requiring every fixture on private property to be designed, located and installed to prevent it to the maximum extent feasible. Subsection (I), Shielding, turns that policy into concrete design rules: the light source itself must not be visible from off the site; glare and reflections must be confined within the site's boundaries to the maximum extent feasible; every fixture must be directed downward and away from adjoining properties and public rights-of-way so that no on-site fixture directly illuminates an area off the site; and, most concretely, lighting on private property may not produce an illumination level greater than one foot-candle on any property within a residential zoning district, measured anywhere except on the site of the light source itself.

506-A backs this with a shielding table keyed to lighting class and lumen output, and a separate note requires any lamp installed on a residential lot to be fully shielded so the lamp itself is not directly visible from any abutting residential lot. Outdoor recreational facilities such as ball fields get a partial carve-out from the lumen caps but not from trespass control: fully shielded lighting is still required for every field unless another type of luminaire will not cause light trespass in adjacent residential neighborhoods, and off-site spill must be limited to the maximum extent possible given the illumination the sport requires.