Outdoor Lighting in Bonneville County, ID (2026)
2 rules for unincorporated Bonneville County, Idaho.
Verified from official government sources
Light Trespass & Shielding
Bonneville County limits how much light a Limited Neighborhood Commercial (LNC) Zone business can throw onto its neighbors: fixtures must be shielded and aimed away from adjacent property, and spillover illumination cannot exceed a 0.5 foot-candle increase.
Bonneville County LNC Zone Light Trespass Cap
Some RestrictionsBonneville County Code of Ordinances § 156.350
all lighting shall be directed away from adjacent properties and shielded to avoid any direct glare; illumination on adjacent properties will not be increased by more than 0.5 foot-candles
Billboard Lighting
Bonneville County caps how bright an LED or tri-vision billboard can glow at night under Code § 152.30(D)(5): the difference between the sign turned off and displaying a full white image cannot exceed 0.3 foot-candles, measured a half hour after sunset. Every electronic billboard must also carry a photocell dimmer that automatically dims with ambient light.
Bonneville County Billboard Lighting Limits
Some RestrictionsBonneville County Code of Ordinances § 152.30(D)
(4) Each electronic message center shall be equipped with a photocell dimmer to automatically dim with changes in ambient light. When requesting a permit for an electronic message center, the applicant shall submit documentation certifying the sign is equipped with a photocell dimmer, and the dimmer shall be used at all times the sign is in operation. (5) The night-time illumination o...
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