Simple Lighting Layout Estimator

Simple Lighting
Layout Estimator

Simple Indoor Lighting Layouts

These estimators provide a rough lighting layout for industrial (high ceiling area) or office (low ceiling area) open spaces assuming average or typical surface reflectances on walls and ceilings in your shop, gym, parking garage, warehouse, office, or commercial space. They are adequate for a “first pass” estimate. More accurate layouts can be done with the indoor design tool link available on the web page for the chosen fixture, or by using a commercial lighting layout program.

All numbers refer to initial lumens and footcandles only.

Area to be lit:
Ceiling height
Estimated FCU*
(Fixture Coefficient of Utilization)

Find Fixture Quantity Required

Footcandles required:

Fixture initial lumens:


No. of fixtures needed:

Spacing (ft.):


Find Fixture Lumens Required

Footcandles required:

Spacing length x width (ft.):


Lumens needed from fixture:


Find Estimated Footcandles

Number of fixtures:

Fixture initial lumens:


Average footcandles: