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

Enter the following information and click "calculate."

Your results will display below.


*Square footage of area to be lit:   
*Desired footcandles:   
*Avg number of hours on per year:   
*Watts per fixture:   
*Number of lamps per fixture:   
*Rated mean lumen per lamp:   
*Ballast Factor (BF)  
*Coefficient of Utilization (CU)  
*Your electric cost per kilowatt hour:  $


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:  
Note: This estimator does not include Light Loss Factors (LLF) from ambient temperature, voltage, dust, and tarnishing.