Lighting Estimator

Estimate the number of fixtures needed to light an area to a specified illuminance.


Area to be lit:   Sft.
Desired illuminance (footcandles):    
Average number of hours on per year:    
Watts per fixture:    
Number of lamps per fixture:    
Rated initial lumen per lamp:    
Light loss factor (LLF):    
Coefficient of Utilization (CU):    
Your electric cost per kilowatt hour:   $
Click on the light bulb to calculate;
the results will be shown below:
Estimated number of fixtures needed:    
Estimated number of lamps needed:    
Estimated fixture spacing:    
Watts per square foot:   watts
Total power load:   kW
Energy cost per year: