Compare the life-cycle costs for two different lamps.

Enter the following information and click "calculate."

Your results will display below.


*Required


*Average number of hours on per year:   
*Electric cost per kilowatt hour:   
 
Lamp 1
Lamp name:   
*Watts (fixture watts/# of lamps):   
*Cost (including disposal cost):  $
*Life in hours:   
*Cost of labor to replace lamp:  $
Mean lumens:   
 
Lamp 2
Lamp name:   
*Watts (fixture watts/# of lamps):   
*Cost (including disposal cost):  $
*Life in hours:   
*Cost of labor to replace lamp:  $
Mean lumens:   
 
Calculate

Results

  Lamp 1        Lamp 2
Lamp name:         
Cost over lamp life:         
Cost per 1,000 hours:         
Cost per year:         
Cost per million lumen hours:         
 
 
Savings with Lamp 2:  /year
* If you are comparing lamps with significantly different light output, the cost per year may have a greater difference. To get a more accurate representation of the cost of light, look at the cost per million lumen hours.