Garage & Gym Lighting Lumens Calculator
Enter your room size and how you use it. You get a lumen target and the kit that balances layout size with output — methodology from our garage and gym lumens guides, IES-referenced. Kit outputs come from each product's published spec range.
Calculate Your Lumen Target
Single bay: about 200 sq ft (10×20). Double: 400 (20×20). Triple: 600.
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Before ordering, check that garage-door tracks, beams, ceiling fans, and opener rails stay clear of the mounting area. Odd ceiling shape or bigger space? Free custom layout from your dimensions in 24 hours. Mounting and wiring: installation guide.
How this calculator works
Garage mode: floor area × an installed lumens-per-square-foot benchmark (75 parking / 100 DIY / 150 home detailing / 250 pro detailing), cross-referenced against IES Lighting Handbook foot-candle recommendations. For ceilings above the typical 8–11 ft range, a planning-level mounting-height allowance applies (×1.15 / ×1.3 / ×1.45) — not a full photometric design with coefficient-of-utilization and light-loss factors, but a practical adjustment for the fact that light mounted higher spreads over more area before it reaches the floor. Full math in the garage lumens guide.
Gym mode: room size × target foot-candles × the same mounting-height allowance, from the gym lumens guide. Above the 8–11 ft sweet spot, light spreads wider and the floor gets less — higher ceilings need more lumens, or a suspension kit.
How we pick the best match: every option is scored as a real configuration — kit, quantity, standard or dimmable, and the exact 30% / 60% / 100% setting it would run at. A dimmable kit is judged on the setting you would actually use day to day, not on its full-power number.
Output match carries the most weight: a configuration whose real output range brackets your target scores highest, and anything above your number starts losing points immediately — there is no free pass for oversizing. Layout comes next: a footprint covering roughly 40–70% of the ceiling supports broader distribution and reduces the risk of darker room edges, and long corridor-shaped rooms favor kits that stretch along the room. The remainder rewards simpler installs and capacity you actually use, so you are not paying for output that never leaves the dimmer. Every figure comes from the kit's published spec range on its product page, judged conservatively from the low end.
Multi-kit per-bay plans are recommended only when they clearly beat the best single-kit option, and near-ties always go to the standard version, the lower price, and the simpler install. If nothing in the stock range makes an honest match, the calculator says so and routes you to a free custom layout instead of forcing a recommendation.
Lumens Calculator FAQ
How does this lumens calculator work?
Garage mode multiplies your floor area by an installed-lumens benchmark for how you use the space (75–250 lumens per square foot, cross-referenced against IES foot-candle recommendations), with a mounting-height allowance for ceilings above 11 ft. Gym mode multiplies room size by a target foot-candle level and the same height allowance. The calculator then scores every kit, quantity, and dimming setting against your target and recommends the configuration that best balances real output, ceiling coverage, install simplicity, and capacity you actually use.
How accurate are the recommendations?
They are planning-level estimates built on each kit's published spec range, judged conservatively from the low end of that range. Real-world results vary with wall color, ceiling height, and layout, so treat the result as a strong starting point rather than a photometric site design. For unusual rooms, our team checks your dimensions by hand with a free custom layout.
Why does it sometimes recommend a dimmable kit?
Each dimmable kit is scored at its real 30% and 60% settings, so it is recommended only when one of those settings actually covers your target — you run that setting day to day with full power in reserve, and the result card shows the setting and its real lumen range. When a standard kit matches your target just as well, we recommend the standard version — it costs less and does the same job.
What if my room is bigger than the largest kit?
Multi-kit layouts are scored the same way as single kits, but a 2-, 3-, or 4-kit per-bay plan takes the top spot only when it clearly beats the best single-kit option — otherwise we keep the install simpler. The result shows the per-kit price and the estimated total, so there are no surprises. Beyond that, send us your dimensions for a free custom layout — our team designs your grid within 24 hours.
Can I use it for barber shops, studios, or workshops?
Yes, as a close guide. Use Garage mode's General DIY level for detail-focused work areas like barber stations and studios, or the detailing levels where color accuracy matters most, and Gym mode's Premium bright levels for a clean, high-impact look in open training or display spaces.