LED Shop Light Fixture Calculator
Answer a few quick questions about your space and we'll recommend the right LED fixtures — and how many you need. Still have questions? Call us at (512) 843-1383 for a free, computerized lighting layout.
How tall is your ceiling (in feet)?
The height determines which fixture type is best. Low ceilings use shop lights; high ceilings need high-output bays.
What is the shape of your space?
L-shaped and irregular spaces need more fixtures to eliminate dark spots around corners.
What is the total square footage?
Enter your total area, or provide length × width and we'll calculate it.
Will fixtures be exposed to water or heavy dust?
Wet or dusty environments require sealed, vapor-tight fixtures (IP65+).
How will the fixtures be mounted?
With ceilings this high, mounting method affects which fixture works best.
Want an exact, computerized lighting layout for your space — for free?
Our lighting specialists will map precise fixture placement for even coverage.
* Fixture counts are estimates based on IES light-level standards targeting a minimum of 80 foot-candles at the work surface. Actual requirements may vary based on room geometry, reflectivity, obstructions, and application. Contact PrimeLights for a precise, computerized lighting layout — it's free.
About Our Commercial Lighting Calculator
Our calculator factors in space size, ceiling height, building shape, and environmental conditions to determine exactly how many fixtures you need — with multiple options to fit your budget and preferences.
We use IES (Illuminating Engineering Society) recommended foot-candle levels, targeting a minimum of 80 foot-candles at the work surface. Combined with your square footage and ceiling height, we calculate how many fixtures you need. Higher-output fixtures mean fewer units — often saving on total project cost and installation labor.
Ceiling Height × Square Footage ÷ Fixture Factor = Number of Fixtures
| Ceiling | Fixture |
|---|---|
| ≤ 10 ft | Bolt™ Shop Lights |
| 10 – 15 ft | Stingray® 4XL / 6XL |
| 16 – 30 ft | Stingray® 6XL / Round Bay™ |
| 31 – 40 ft | Stingray® 8XL / 10XL / Round Bay™ |
| 40+ ft | Stingray® 10XL / Round Bay™ |
PrimeLights offers fixtures in two tiers: Made in USA fixtures are fully manufactured domestically, while Made in North America Gen 2.0 fixtures are designed in Texas and assembled in Mexico with higher-efficiency 180 LPW tubes.
Both lines carry the same 5-year warranty, UL/ETL/CSA certifications, and free shipping.
Spaces exposed to moisture or heavy dust need vapor-tight fixtures rated IP65+. PrimeLights' Hawkeye™ line and Round Bay™ UFO fixtures are purpose-built for car washes, food processing, barns, and other harsh environments.
Lumens measure total light output. Foot-candles measure how much light reaches a surface. Foot-candles drop as ceiling height increases, which is why taller ceilings need higher-output fixtures. We target a minimum of 80 foot-candles for bright, productive workspaces.
LED saves 50–75% on energy vs fluorescent/HID with brighter, more uniform light. LEDs last 50,000+ hours, turn on instantly, produce little heat, and contain no mercury.
Every PrimeLights customer gets a free computerized lighting layout — we'll show you exactly where to place each fixture for even coverage. Free shipping on all orders and a 5-year warranty.
