This calculator is used to quantify the savings of a lighting upgrade. You can calculate:

1. Annual lighting energy use
2. Total energy savings
3. Total dollar savings
4. Greenhouse impact reduction

To find out these potential savings, please complete the fields in the blue boxes. Simply tab between boxes to recalculate your results.

1. Annual lighting energy use	Existing lights	New lights (upgrade)
Lamp types	Select Existing LampsFluoro halo T8Fluoro tri T8Fluoro tri T5IncandescentCompact (CFL)	Select Upgrade LampsFluoro halo T8Fluoro tri T8Fluoro tri T5IncandescentCompact (CFL)
Number of light fittings
Number of lamps per fitting
Power input of each lamp (watts)
Power input of each ballast (watts)
Total power input (watts)
Operating hours per year (hours) (hours per day x days per year)
Total annual lighting energy use (kWh)
2. Total energy savings		Upgrade
Total energy saved from lighting upgrade (kWh)
Is the space airconditioned (Efficient lighting produces less heat, so air conditioning can be decreased. This adds up to 25 percent to energy savings!)		YES
Total energy savings per year (kWh)
3. Total dollar savings		Upgrade
Average electricity price (cents per KWh) (on your electricity bill)
Dollar savings per year  ($) (energy savings per year x electricity price)
Maintenance costs saved per year ($) (for instance, energy efficient lamps save energy, but also you save money by not having to replace them as often)
Total dollar savings per year ($)
Estimated conversion costs, parts and labour  ($)
Simple payback (how long it takes to get your money back)
Average rate of return (the return on your lighting upgrade investment)
4. Greenhouse gas reduction		Upgrade
Greenhouse gas reduction (tonnes CO2) (every kilowatt hour you save, saves about 0.92kg of greenhouse gas)
Equivalent to taking this number of cars off the road (on average each car produces 4.5 tonnes of greenhouse gas each year)