Tucson's Outdoor Lighting Code specifically addresses light trespass — light that spills onto neighboring properties or into the night sky from poorly aimed or unshielded fixtures. The code requires that outdoor lighting be directed downward and shielded to minimize light crossing property boundaries. Light trespass complaints are a common enforcement trigger.
The code sets maximum illumination levels at property boundaries. Residential properties should not cast more than 0.5 footcandles of light at the property line from any individual fixture. All exterior fixtures must be full cutoff or fully shielded to prevent light from being emitted above the horizontal plane. Flood lights and security lights are common sources of complaints and must be properly aimed and shielded.
Light trespass complaints can be filed with Code Enforcement. Violators receive a notice to correct, typically requiring re-aiming or shielding of fixtures within 30 days. Persistent violations result in civil penalties.
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Side-by-side rule comparisons with other cities in Pima County.
See how other cities in Pima County handle light trespass.
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