New Mexico Dark Sky Rules (2026)

Key Facts

Statute: NMSA 74-12-1 et seq.
Shielding required: Full cutoff fixtures
Curfew: 11:00 PM commercial
Mercury vapor: Banned new installs
Max fine: $250 per violation

Full Breakdown

The Night Sky Protection Act (NMSA 74-12-1 to 74-12-11) requires most outdoor lighting installed after 1999 to be fully shielded so light is cast below the horizontal plane. Mercury vapor lamps and unshielded floodlights are restricted. Outdoor recreational facility lights and certain commercial signs must be turned off after 11:00 PM unless in use. The law applies statewide and is enforced through the building permit process, with municipalities required to incorporate the standards. Exceptions exist for emergency lighting, navigation lighting, and specific federally regulated uses.

Violations & Penalties

Civil penalties up to $250 per violation; non-compliant fixtures must be replaced or retrofitted; building permits may be denied for non-conforming installations.

Frequently Asked Questions

Does the Night Sky Protection Act apply to my home?

Yes for new outdoor fixtures installed after 1999. Residential lighting must generally be shielded so light projects below horizontal, though small low-wattage fixtures and holiday lights are exempt.

Can my city impose stricter outdoor lighting rules?

Yes. The state law sets a minimum standard, and many New Mexico cities including Santa Fe and Albuquerque have stricter dark-sky ordinances layered on top of the statewide requirements.

New Mexico Night Sky Protection Act Lighting Rules