SIMPLE ENERGY Estimator
Copyright ©2002
General Electric Company
All Rights Reserved
Version 1.03
Calculate energy used by proposed system upgrade, compare with existing system and calculate time to recoup investment.
SEE INSTRUCTIONS AT BOTTOM.
INPUT
OUTPUT....................

Number of Fixtures
(Current system)
Energy used per yr.
Enter the amount needed to upgrade each fixture and press "Calculate" again.
Hours burned
per yr.
(Proposed system)
Energy used per yr.
Investment to upgrade (per fixture)
$
Cost per kWh $

Energy savings per yr.
Total

Energy savings alone will recoup investment in
True payback including labor avoidance, A/C savings, etc. can be calculated by using GE's value*light tool which can be downloaded from www.gelighting.com (North America)
(Current System)
Watts per fixture
Energy savings per yr.
Each fixture
(Proposed System)
Watts per fixture

INSTRUCTIONS: Enter the correct numbers in the 5 gray cells on the left and press "Calculate". You may change the default numbers provided for cost per kWh, hours burned, etc.. NEXT STEP: If you put in the investment to upgrade (per fixture) and press "Calculate" again you will discover the time it takes--from energy savings alone--to recoup the investment.
This investment should include lamp, ballast and labor required to get the fixture ready; you may subtract any offsetting costs that would have been incurred with the current system. Example: if you were going to relamp anyway, then the labor would wash out and not be included in the investment. Also, you would subtract the cost of the old lamp from the cost of the proposed upgrade lamp as an offsetting cost, figuring out only how much "extra" it cost to perform the upgrade.