# How much switching to LED Light Bulbs can lower your electricity bills?

Your electricity bill is the sum of the KWh* that you consume in a month, multiplied by the price of this KW in your region. In the USA the price of the KW ranges from 8 to 15 Cents, according to your place and region**.

Let’s say for example that you have at your home 20 (100 W) standard incandescent lamps and you use each of them for an average of 5 hours every day. So the total yearly consumption of these lamps would be:

20 (Lamps) X 100 (Watts) X 10 (hours) X 365 (days/year) = 3.650.000 Wh = 3.650 KWh

Then your bill would be 3.650 X \$0.12** = \$438

If you substitute these lamps by LEDs with the same intensity of light (the measurement unit is Lumens), you will get an equivalent 13 W LED bulb instead of the 100 W old one.

20 (LED lamps) X 13 (Watts) X 5 (hours) X 365 (days) = 474.500 Wh = 474.5 KWh

And you will pay 474.5 X \$0.12** = \$56.94

Hence, the difference in your yearly bill will be: 438 – 56.94 = \$381.06 U.S. Dollars

Which is equal to 87% of savings \$\$

Finally, if we change your 20 old lamps with our LEDs you will pay approximately

20 X \$8*** = 160\$

And your profit after 1 year will be 381-160= \$221 for the 1st year,

Then \$381 each year for at least 5 years, which equals to more than \$2.000

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* Watt/hour is the electricity consumption unit, 1 KWh= 1000Wh

** The average price people in the U.S. pay for electricity is about 12 cents per kilowatt-hour. (Context: A typical U.S. household uses about 908 kWh a month of electricity.) – Source: Energy Information Administration

*** This price is for 13W LED lamp, Prices range from \$1.99 (2W) to \$19.99 (18W) according to the Watt and Lumens of the lamp.

Comparison Chart: LED Lights vs. Incandescent Light Bulbs vs. CFLs

http://www.designrecycleinc.com/led%20comp%20chart.html