Garage Workshop Task Zone Calculator Australia

Estimate fitting count, nominal spacing, beam diameter, maintained lux and load for one garage task zone.

Workshop zone

Task zone size, fitting output and beam data

Enter one garage bench, tool bay or work zone. The result estimates fitting count, nominal spacing, beam spread and load without turning the note into electrical design.

Measured length of the controlled zone.

Measured width of the controlled zone.

Maintained lux target for the task or workplane.

Published output for one luminaire.

Input power for one luminaire.

Height from floor to fitting.

Height of the assessed surface.

Published beam angle for the fitting.

Allowance for light reaching the workplane.

Allowance for ageing, dirt and lumen depreciation.

Formula

count = ceiling((area x target lux) / (UF x MF x lumens per fitting)); nominal spacing = sqrt(area / count); beam diameter = 2 x effective height x tan(beam angle / 2)

The task-zone area is multiplied by target lux, adjusted by UF and MF, divided by fitting output and rounded up. Beam diameter and nominal spacing are then read beside the task plane.

VariableTechnical meaningDesign check
Zone length and widthMeasured garage task area.Do not use the whole garage when only a bench is being checked.
Target luxMaintained task-plane target entered by the user.Keep it as a planning value, not certification.
Luminaire outputPublished lumens for one fitting.Pair output with beam and mounting height.
Mounting and workplane heightEffective throw to the bench or floor.Bench checks differ from floor checks.
UF and MFDelivery and maintained-light assumptions.Dusty or obstructed spaces justify conservative values.

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