Light Bulb Calculator
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Light Bulb Calculator

Your energy use with INCANDESCENT bulbs
 
Type in the bulbs you use:
# of bulbs on hrs / day watts

Energy Costs
Total usage: kW-hrs / yr 
Total cost: $ / yr 
Bulb Replacement Cost
incandescent bulbs, costing $ per year.
Your energy use with FLUORESCENT bulbs
 
 
Watts with equivilant brightness
watts 
watts   
watts   

Energy Costs Total
kW-hrs / yr  Savings
$ / yr  $ / yr 
Bulb Replacement Cost
fluorescnet bulbs, costing $ per year.
Base Costs

These calculations are based on the following assumed costs for electricity and replacement bulbs.

item cost expected life
electric power $ 0.095 kW-hr  n/a
13W fluorescent $ 3.005 /each  10000 hrs 
18W fluorescent $ 3.005 /each  10000 hrs 
27W fluorescent $ 3.005 /each  10000 hrs 
30W fluorescent $ 3.005 /each  10000 hrs 
25W standard $ 0.50 /each  2500 hrs 
40W standard $ 0.50 /each  1000 hrs 
60W standard $ 0.50 /each  1000 hrs 
75W standard $ 0.50 /each  750 hrs 
100W standard $ 0.50 /each  750 hrs 
200W standard $ 2.00 /each  750 hrs 

Find out how you can save money and help the environment by switching to energy efficient compact florescent bulbs. Enter your data in the blue area below and click another cell to see the calculated results.