Cost/Rebate/Payback Analysis
The economics of a typical fixture retrofit are as follows:
· Existing 2' x 4' luminaire, containing four F40T12/Cool White lamps (each is a 40-watt lamp), and two standard magnetic ballasts.
Existing System Wattage = 190 watts (per FPL wattage tables).· Retrofit existing luminaire, by installing two FO32T8 lamps (each is a 32-watt lamp), and one electronic ballast.
New System Wattage = 62 watts (per FPL wattage tables).· Watts saved = 138 watts (or 0.138 kilowatts)
· Energy Saved = 0.138 x hours of operation = kilowatthours saved.
· Energy Cost Savings = kilowatthours saved x cost/kilowatthour
Assuming:
Hours of Operation - 4,000 hours per year
Average cost of electricity - 7 cents/kilowatthourA typical retrofit will result in energy savings in excess of $38/year.
If the retrofit cost is $75.00 and the rebate is $13.80, the net cost of $61.20 will be paid out of savings in about 1.6 years.
This is equal to a return on investment of 62%.
Let S&H Energy Services provide you with a free preliminary survey of your lighting equipment and actual projections of cost and energy savings.
