Lighting Estimator

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

Enter the following information and click "calculate."
Your results will display below.

* Required
 
* Square footage of area to be lit:    
* 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:   $
  calculate
Results
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: