Arizona protects its night sky more actively than almost anywhere else in the country, and that protection shows up in local building codes. If you are replacing porch lanterns, adding path lighting to a new landscape design, or specifying site lighting for a commercial property in the Valley, there is a good chance an outdoor lighting ordinance applies to what you buy.
The rules are less complicated than the code language makes them sound. Here is the plain-English version, plus what to actually look for on a spec sheet.
Why Arizona regulates outdoor lighting at all
The state has world-class observatories, and the effort to keep their skies usable started early. Tucson and Pima County adopted the first comprehensive outdoor lighting code anywhere in 1973, and Flagstaff became the first certified International Dark Sky City. Today most Arizona cities and counties have some version of a lighting ordinance on the books.
The underlying goal is simple: light the ground, not the sky. Almost every requirement in these codes exists to stop light from escaping upward or sideways instead of landing where you actually need it.
The core requirement is shielding
Maricopa County’s dark sky provisions live in Article 812 of the County Zoning Ordinance. The baseline rule is that outdoor light fixtures must be shielded, with a narrow exception for a single incandescent bulb of 150 watts or less. The county has also issued guidance clarifying that the exception is limited to incandescent sources within that wattage cap. Anything brighter, and any other lamp type, needs shielding.
There is a second exception for genuinely low-output fixtures: one producing under 1,000 candelas cumulative does not need shielding if it is equipped with an automatic shutoff device. The ordinance also treats an entire string of lights as a single fixture.
When you are shopping, “shielded” translates to a few specific things. The lamp should not be visible from the side or from above. The fixture should throw no light above horizontal. Manufacturers describe this as full cutoff, fully shielded, or dark sky rated, and many spec sheets carry an International Dark-Sky Association approval mark.
Scottsdale adds a design review layer
Scottsdale handles exterior lighting through its zoning ordinance and its design guidelines, and exterior lighting designs go to the Development Review Board for approval. The stated intent is to minimize glare and light trespass, conserve energy, and maintain dark skies, with Illuminating Engineering Society light level recommendations used as a reference point.
For commercial and multifamily projects, that means photometric plans. Scottsdale asks for at least two studies per project: horizontal illuminance across the site, and vertical light trespass around the perimeter, each with point-by-point footcandle readings. If you are a builder or designer working in the city, the lighting package is part of the submittal, not an afterthought.
Homeowners swapping fixtures on an existing house have a much lighter lift, but the same shielding and glare principles apply, and HOA design standards often add their own requirements on top.
A shopping checklist
● Direction. Look for downward-facing fixtures with solid, opaque tops. A lantern with clear glass on all sides and an open top is the classic non-compliant fixture.
● Color temperature. Warm light scatters less. 2700K or warmer is the safe default, and some stricter codes require amber or narrow-spectrum LED for certain fixture classes.
● Output, not maximum output. Over-lighting is the most common mistake homeowners make. Glare from an overly bright fixture actually reduces what you can see beyond it.
● Controls. Timers, photocells, and motion sensors satisfy curfew provisions and cut energy use. They are also the cheapest way to bring an otherwise borderline fixture into line.
● Aim. Landscape fixtures should be aimed down and away from property lines. Hooded path lights keep light on the walkway instead of in a neighbor’s bedroom window.
● Uplighting. Many codes restrict or prohibit uplighting of facades and trees. If you want it, check your jurisdiction before you buy well lights or shielded spots.
Fixture types that tend to comply well
Wall lanterns with solid tops and frosted or seeded side glass do the job on most residential exteriors, and the styling range is wide enough that compliance costs you nothing aesthetically. Downlight-only sconces, shielded flush ceiling fixtures for porches and patios, hooded path lights, and recessed step lights are all straightforward choices.
You can browse our full exterior lighting collection (https://shoppremier.com/collections/exterior), landscape lighting (https://shoppremier.com/collections/landscape-lighting), and outdoor lanterns (https://shoppremier.com/collections/foyer-hall-lanterns) online, and the spec sheet on each product page will tell you the shielding, lumen output, and color temperature.
Confirm your jurisdiction before a big project
Requirements vary from city to city across the Valley and around Tucson. Fountain Hills is a certified dark sky community with its own standards. Cave Creek, Paradise Valley, Oro Valley, and Flagstaff each regulate differently, and Flagstaff’s code is among the strictest in the country. Arizona also addresses light pollution at the state level under Title 49 of the Revised Statutes.
This article is a general overview to help you shop, not a code determination. For a new build, a remodel that adds fixtures, or any commercial site lighting, confirm the current requirements with your city or county planning department before you order.
Frequently asked questions
Does dark sky compliant mean dim?
No. Shielding redirects light downward rather than reducing it. A well-shielded fixture usually puts more usable light on the ground than an unshielded one at the same wattage, because none of it is wasted upward.
Can I use LED fixtures?
Yes. Most ordinances care about shielding, direction, output, and color temperature rather than the light source itself. Warmer LEDs are generally the better choice under these codes.
What color temperature should I choose?
2700K or warmer for residential exteriors. It reads as a soft, natural glow, scatters less in the atmosphere, and flatters stucco, stone, and desert landscaping better than cooler light.
Do string lights and holiday lights count?
Under Maricopa County’s interpretation, an entire string of lights is treated as a single light fixture. Many jurisdictions also carve out seasonal exemptions with date limits, so check locally.
Do I need a permit to change my outdoor lights?
Replacing an existing residential fixture typically does not require one. New commercial or multifamily site lighting generally does, along with photometric plans.
Come see it lit
Shielding is easier to understand when you can stand under two fixtures and see the difference. Our Scottsdale showroom (https://shoppremier.com/collections/premierlighting) and Northside Lighting in Tucson (https://shoppremier.com/collections/northsidelighting) have working exterior displays, and our staff work with local builders and designers on code-compliant packages every week. Bring your plans, your HOA guidelines, or just a photo of your entry.