Do I Need a Photometric Plan for My Parking Lot?

Usually yes if you’re building new, adding parking, or changing an approved site plan in a way that touches the lighting. Usually no if you’re replacing fixtures, relamping, or repairing what’s already there and no permit is open. Your county or city has the final word, and if it wants a plan, the review letter will say so.

That’s the honest answer, and it isn’t the one you’ll get from most of the pages ranking for this question, because most of them are published by somebody selling photometric plans or light fixtures. We produce photometric plans too. We’d still rather tell you when you don’t need one.

If you manage a shopping center, sit on an HOA board, or look after a church campus, this is written for you as much as for a developer. Here’s how to tell which side of the line your project falls on.

When you almost certainly need one

A photometric plan is a scaled drawing that shows the calculated light level across your site, point by point, so a reviewer can see the lighting works before anything is installed. Counties ask for one when lighting is part of what they’re reviewing. In practice, that means:

1. New commercial construction with any parking area. Sarasota County’s code, for example, requires a site lighting plan with the review of any nonresidential or multifamily site development plan. Lee County requires an exterior lighting plan and photometrics with a development order application.
2. Adding parking or expanding the lot. New paving means new lighting, and new lighting gets reviewed.
3. A site plan amendment that changes the lighting. Moving poles, adding fixtures, or changing the layout of the lot.
4. Major redevelopment. Charlotte County’s commercial design standards, which include its lighting rules, apply to new development and to redevelopment that grows a building’s floor area by more than 50 percent. Collier County uses a similar 50 percent trigger.
5. Coastal parcels near a nesting beach. Sea turtle lighting ordinances add their own review, covered below.

When you probably don’t

This is the part most pages leave out. The codes in our area are generally written around development, not upkeep. Collier County’s site design standards exempt routine repairs and maintenance outright, and Charlotte County’s commercial design standards don’t reach an existing site unless it’s being substantially rebuilt. In general, you probably don’t need a photometric plan for:

• Replacing a failed fixture with the same or an equivalent fixture
• Switching to LED on an existing, permitted system (more on this in a moment)
• Relamping, cleaning, and pole repair
• Interior lighting, which is a different review entirely
• An existing lot where nothing about the lighting is changing

There are two honest exceptions. The first: if you’re already in for a permit on something else, the lighting can get pulled into that review. A reviewer looking at your new parking spaces or your building addition is entitled to look at the poles too. The second is the coast, where some ordinances reach existing lighting with no project at all.

What about switching to LED?

Owners swap fixtures when they fail, and almost everything going up now is LED. That’s generally treated as maintenance, not a project. As Erik Colleen at Creek puts it: “They do it when they do it.” In our experience, an LED conversion on its own doesn’t set off a lighting review.

Unincorporated Lee County is the one place to read the fine print. Its current code says every new outdoor light fixture on a commercial or multifamily property has to meet the county’s lighting standards, including fully shielded, full cutoff fixtures, “regardless of whether a development order is required.” And any building permit application involving outdoor fixtures there is supposed to include photometrics. If your LED swap in unincorporated Lee is going in under a building permit, ask the county before you order fixtures. Either way, buying shielded, full cutoff fixtures costs you nothing and keeps you on the right side of the rule.

The two things a photometric plan has to prove

Every lighting review comes down to two numbers that pull against each other. Asked what gets a plan rejected, Erik put it in one line: “Not enough light in certain areas, or too much light at the property line.”

Enough light where people walk and drive. Drive aisles, parking stalls, and walkways carry minimum levels, measured in foot-candles. A foot-candle is roughly the light from one candle at a distance of one foot. The plan also has to show uniformity, meaning the light is reasonably even across the lot. A lot with bright pools under the poles and dark gaps between them can average out fine and still fail, because the dark gaps are where someone trips or a car door gets opened into a shadow.

Not too much light past your property line. This is the half that catches people off guard, and the rule behind it is reasonable. The house behind your lot didn’t agree to have a parking lot shining into its bedroom windows, and the driver on the road out front shouldn’t be squinting into your glare. That’s why every county in our area writes in some version of “prevent glare or spillage onto adjacent properties.”

Here’s how we handle it: we treat the property line as the zero point. Full, robust light inside your property, and effectively zero at the line. The codes that put a number on it allow a small amount of light at the boundary. We design to zero anyway, because a neighbor or a code enforcement officer can stand at that line with a meter, and a plan that barely passes on paper has no room for what happens in the field.

Getting both right at once is the actual engineering. Raising a pole or widening a beam to fill a dark corner can throw light over the line thirty feet away, so the answer is a calculation across the whole site, not a brighter fixture.

What’s drawn versus what’s installed

A plan is only as good as the installation. We specify the mounting height, the fixture model, the setting, the shielding, and the aim, and the contractor is responsible for installing to it. An inspector will catch a floodlight aimed at the neighbor’s house. An inspector usually won’t catch a fixture mounted three feet off, or a downlight that went up without its shield, and both change the light the plan was approved on.

Lee County closes that gap on paper: before final sign-off, its code calls for field-measured foot-candle readings showing the lighting as installed matches the approved photometrics, with a professional engineer certifying compliance. It also won’t let the calculation lean on a light loss factor, so the plan is checked against the fixtures’ initial output. Even where your county doesn’t ask, it’s worth knowing the plan is meant to be built exactly.

How many foot-candles does a parking lot need?

It depends on where your lot is, and that isn’t a dodge. There’s no single statewide number. The national reference is the Illuminating Engineering Society‘s recommended practice for roadway and parking lighting, ANSI/IES RP-8-22, which many designers and some local codes lean on. But the number your plan has to hit is the one in your local code, and the four coastal counties we work in each handle it differently:

County	Where the lighting rule lives	What stands out
Sarasota	Unified Development Code, Sec. 124-126	Publishes a full table of minimum, average, and maximum levels by use. The average is a ceiling, not a target
Lee	Land Development Code, Sec. 10-262	Property line limits, a 20-by-20-foot calculation grid, and field verification before sign-off
Charlotte	County Code, Sec. 3-5-512 (commercial design standards)	Pole height limits and shielding; no published foot-candle table
Collier	Land Development Code, 5.05.08 and 4.05.02	Shielding and pole height limits; parking lots lit “as unobtrusively as possible”

That Sarasota detail is worth a second look. Brighter isn’t automatically better on a lighting plan. Some codes cap the average light on your lot, so over-lighting can fail a review just like under-lighting can.

One more wrinkle: the cities write their own codes. Punta Gorda, North Port, Cape Coral, Fort Myers, Naples, Venice, and the City of Sarasota don’t follow the county rule inside their limits. If you’re not sure who reviews your property, our Florida building departments directory is a good place to start.

Coastal properties are a different problem

If your property is near a nesting beach, a sea turtle lighting ordinance sits on top of everything above, and it asks for close to the opposite of standard parking lot design: low, shielded, long-wavelength fixtures where the parking lot wants tall poles and broad light. Each of our coastal counties has one: Charlotte (Sec. 3-5-299), Lee (Chapter 14), Sarasota (Chapter 54, Article XXIII), and Collier (LDC 3.04.02). Reach depends on the county, generally keyed to distance from the beach, the coastal construction control line, or whether your lights are visible from the sand.

Charlotte’s ordinance is the one to note if you own an older coastal property, because it reaches existing development as well: lighting that predates the ordinance has to be repositioned, modified, or replaced as needed to comply. No project required.

Our guide to Florida’s sea turtle lighting restrictions walks through what these ordinances ask for, and the photometric plans page covers designing a lot that satisfies both.

What it costs and how long it takes

We don’t publish a price or a turnaround, because both depend on the site. The things that move the number are:

1. The size and shape of the site, and how many fixtures it takes to light it evenly
2. Whether there’s a CAD survey or site plan to build the drawing on
3. Whether it’s part of a larger site package or a standalone plan
4. The jurisdiction, since a county that wants a 20-by-20 grid and field verification asks for more than one that doesn’t
5. The coast, if a sea turtle ordinance applies

If the plan is part of a larger site job, it’s one piece of the commercial site work package, alongside grading, drainage, and utilities. If you’re repaving at the same time, the lighting and the pavement usually land in the same capital budget, and so does road core testing if you want to know what’s under the asphalt before you resurface.

What to do next

If you’re not sure whether you need a photometric plan, the cheapest first step is free: ask the reviewer. Call the planning or zoning desk for your county or city and describe what you’re changing. If you already have review comments, read the lighting section closely, because it will usually tell you exactly what it wants.

If the answer is yes, or the comment doesn’t make sense, send us the review letter and the site plan. We’ll tell you what the lighting section is actually asking for, and if it turns out you don’t need a plan, we’ll tell you that too. Creek has been serving Southwest Florida since 2002, and that’s still the most useful phone call we make. Contact us to get started.

Frequently asked questions