Calculate Savings - Feit CFL 9 Watt (50W) PAR20 Cool White (3500K)

light bulb savings calculations

Estimated savings based on assumptions below

	Per Year	Lifetime
Dollars Saved	$8.87	$48.60
Kilowatt Hours Saved	75	410
Gallons of Water Saved	0	0
Trees Planted	0	0

To customize calculations, enter your data below

Feit CFL 9 Watt (50W) PAR20 Cool White (3500K)

Wattage

9 watts

Rated Lifetime

10,000 hours

price

$6.45

average incandescant (INC) light bulb

Wattage

watts

Rated Lifetime

hours

price

Utility Costs and Usage

cost per kilowatt hour
bulb use per day	hours

Step 1 find the number of INC bulbs needed over this bulb's lifetime

10000 / 750 = 13.3333

Step 2 determine the cost of replacement INC bulbs and the difference with this bulb's cost

13.3333 * $0.50 = $6.67 cost of replacing the INC bulb

$6.67 - $6.45 = $0.22 replacement savings

Step 3 determine energy usage over the life of this bulb

50 watts * 10000 hours / 1000 watts per kW = 500 kWh

9 watts * 10000 hours / 1000 watts per kW = 90 kWh

Step 4 subtract to find the difference in energy usage between the bulbs

500 kWh - 90 kWh = 410 kWh lifetime savings

Step 5 find the lifetime energy cost savings

410 kWh * $0.118 = $48.38

Step 6 combine energy savings with replacement cost savings to find total lifetime savings

$48.38 + $0.22 = $48.60 total lifetime savings

Step 7 find savings per year

5 hours per day * 365 days per year = 1825 hours per year

1825 hours per year / 10000 lifetime hours = 18.25% of bulb life used per year

18.25% * 410 kWh lifetime savings = 74.825 kWh yearly savings

18.25% * $48.60 lifetime savings = $8.87 yearly savings

Savings calculations are presented as an example of potential savings; actual savings may vary based on use, utility rates and other factors. Calculations are based on national averages and assumptions and may be adjusted for a more accurate estimate of individual savings. While EnergyEarth strives to provide the most accurate information, we cannot guarantee the savings displayed.