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Simple Life-Cycle Estimator

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:

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.