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Grand Prairie, TX Outdoor Lighting: Dark Sky Rules (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Fixture type required
Down-light, indirect, diffused or shielded
Bare bulb limit
Over 15 watts prohibited
Strings of lights
Prohibited except as temporary display
Temporary display cap
45 days per year
Governing section
UDC Sec. 10.15.5

Summary

Grand Prairie's Unified Development Code requires outdoor light fixtures to be down-light, indirect, diffused or shielded so they don't spill glare onto neighboring property and streets. Section 10.15.5 bans bare bulbs over 15 watts and strings of lights outright, allowing them only as temporary displays capped at 45 days a year.

Light sources shall be of a down-light type, indirect, diffused, or shielded type luminaries and/or so installed and maintained as to reduce glare effect and consequent interference with use of adjacent properties and boundary streets. Bare bulbs above 15 watts and strings of lamps are prohibited, except for temporary lighting not exceeding forty-five (45) days per year.

Full Breakdown

5, part of Article 10's Glare and Lighting Standards, requires that light sources be of a down-light type, indirect, diffused, or shielded type luminaries, and/or so installed and maintained as to reduce glare effect and interference with adjacent properties and boundary streets. The section then draws a bright line for decorative and unshielded fixtures: bare bulbs rated above 15 watts and strings of lamps are prohibited outright, with a single carve-out for temporary lighting that runs no more than 45 days in a calendar year, covering seasonal or event displays without permitting them as a permanent feature.

4's minimum parking-lot intensity standard, an average of at least two foot candles initial and one foot candle maintained on the pavement surface, so a site has to satisfy both a floor and a ceiling: enough light to meet the parking-area minimum without exceeding the glare limits at the property line, using fixtures that are the down-light or shielded types this section requires. Compliance is reviewed as part of the site's lighting plan during development review, and the Building Official's staff can require a fixture swap, added shielding, or relocation of poles before a Certificate of Occupancy issues if installed lighting does not match the approved plan or produces disallowed glare.

Violations & Fines

Installing bare bulbs over 15 watts, running strings of lamps as permanent lighting, or using fixtures that are not down-light, shielded or diffused violates Section 10.15.5; the temporary-lighting exception only protects displays run for 45 days or less per year. Non-compliant sites can be held up at Certificate of Occupancy review and ordered to replace or reshield fixtures before occupancy is granted.

Frequently Asked Questions

Are string lights allowed on my property in Grand Prairie?
Only as temporary lighting. Section 10.15.5 prohibits strings of lamps as a permanent fixture but permits them for displays that run 45 days or fewer in a calendar year, after which they must come down or be replaced with a shielded, down-light fixture.
What kind of outdoor light fixtures does the city require?
Fixtures have to be down-light, indirect, diffused or shielded types installed and maintained to cut glare toward neighboring properties and streets; a bare bulb rated above 15 watts does not qualify and is banned outright under Section 10.15.5.
Is this a dark-sky ordinance for astronomy, or a nuisance-glare rule?
It's framed as a glare and nuisance standard rather than a night-sky preservation ordinance: Section 10.15.1 states its purpose is protecting neighboring property owners' enjoyment of their land and reducing driver glare, achieved through the same shielded-fixture requirement a dark-sky rule would use.

Sources & Official References

Other rules in Grand Prairie

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