Dark Sky Rules: Denton vs Flower Mound
How do dark sky rules rules compare between Denton, TX and Flower Mound, TX?
Denton and Flower Mound have similar restriction levels.
Denton, TX
Denton County
Denton Development Code (Subchapter 19, Outdoor Lighting) establishes outdoor lighting standards that incorporate dark-sky principles for new development and major renovations. All new non-residential and multi-family lighting must be fully shielded to direct light downward and minimize skyglow. Denton adopted these standards to reduce light pollution affecting the University of North Texas observatory and surrounding residential neighborhoods.
View full Denton rules →Flower Mound, TX
Denton County
Flower Mound regulates outdoor lighting through its zoning ordinance and development standards to minimize light pollution and preserve nighttime sky quality in the community. New commercial, multifamily, and subdivision developments must use fully shielded, downward-directed fixtures and submit photometric plans during the development review process. The town's lighting standards address fixture types, maximum mounting heights, footcandle levels at property boundaries, and acceptable glare levels to reduce sky glow across the community. Development adjacent to the Cross Timbers Conservation Development District and other environmentally sensitive natural areas may face additional lighting restrictions imposed during the planned development approval process. These requirements reflect the town's commitment to balancing necessary security and safety lighting with the preservation of the natural character that defines Flower Mound's identity as a community surrounded by preserved open space and conservation corridors.
View full Flower Mound rules →Key Facts Comparison
| Fact | Denton | Flower Mound |
|---|---|---|
| Shielding | Full-cutoff required for new non-residential | - |
| Max Height | 25 ft commercial, 20 ft near residential | - |
| Mercury Vapor | Prohibited in new installations | - |
| Residential | Single-family exempt from Development Code | - |
| Contact | (940) 349-8530 Development Services | - |
| Fixture Type | - | Fully shielded / full cutoff required |
| Max Pole Height | - | 25 feet for parking lots |
| Property Line Limit | - | 0.5 footcandles at residential boundary |
| Photometric Plan | - | Required for commercial/multifamily |
| Fine Range | - | Up to $2,000 per day |
Highlighted rows indicate differences between cities.
Denton FAQ
Does Denton have a dark sky ordinance?
Denton has outdoor lighting standards in its Development Code that incorporate dark-sky principles. New commercial, industrial, and multi-family lighting must be fully shielded to direct light downward and minimize glare and skyglow.
Do Denton dark sky rules apply to my house?
Single-family residential properties are generally exempt from the Development Code lighting standards. However, your HOA may have dark-sky covenants, and excessive residential lighting that creates a nuisance for neighbors can be addressed through the nuisance ordinance.
Are mercury vapor lights banned in Denton?
Mercury vapor lamps are prohibited in new lighting installations under the Development Code. Existing mercury vapor fixtures are grandfathered unless the property undergoes a major renovation requiring site plan review.
Flower Mound FAQ
Does Flower Mound have dark sky lighting rules?
Yes. The town requires fully shielded, downward-directed fixtures for all new commercial and multifamily development. Light trespass at residential property lines must not exceed 0.5 footcandles. Photometric plans are required as part of the development review process.
Do these rules apply to my existing house?
Existing single-family homes are not retroactively required to replace fixtures. However, new residential construction must comply with current lighting standards at the time of building permit issuance.
What is a fully shielded fixture?
A fully shielded, or full cutoff, fixture is designed so that all light is directed downward below the horizontal plane of the fixture housing. This prevents upward light that contributes to sky glow and reduces direct glare visible from adjacent properties and roadways.
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