Oct 02, 2026 / By the Lumibox team / in LED Guides
Tool: for a high-ceiling garage or shop, try our LED high bay calculator.
| Garage | Area | General layer (50 lm/sq ft) | Bench layer to add |
|---|---|---|---|
| Single, 12 x 22 ft | 264 sq ft | about 13 000 lm | 1 600 to 2 000 lm over an 8 ft bench |
| Double, 20 x 20 ft | 400 sq ft | about 20 000 lm | 1 600 to 2 000 lm |
| Double deep, 24 x 24 ft | 576 sq ft | about 29 000 lm | 1 600 to 2 000 lm |
| Triple, 32 x 24 ft | 768 sq ft | about 38 000 lm | per bench |
Plan about 50 lumens per square foot of general light. A 20 x 20 ft (400 sq ft) two-car garage needs around 20 000 lumens, plus 1 600 to 2 000 lumens over the workbench. Six 3 200-lumen shop lights or four 5 980-lumen vapour-tight fixtures reach that target.
Between 4 000 and 5 000 K. Choose 5 000 K daylight white over a bench or a lift for readability of wires, parts and finishes, and 4 000 K natural white for a finished garage attached to the house.
Yes. LED fixtures reach full brightness instantly, with no ballast or tube to fail, and some are rated to operate down to -40 °F (-40 °C). Fluorescent tubes dim, flicker and age quickly in the cold.
Only if the ceiling is about 15 ft or higher, as in a shop, a barn or a lift bay. Under 12 ft, linear shop lights, wraparounds or vapour-tight fixtures spread the light better and glare less.
Yes, in a finished and insulated ceiling, as long as the fixtures are airtight, IC-rated and wet-location rated. Use 4 to 8-inch slim panels (750 to 1 350 lumens each) in lines above the aisles and add a dedicated fixture over the bench.