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.
Your consumption will then become:
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
Now, if you are ready to pay $160 to save $2.000
First 100 customers will get 20% OFF
Number of Customers so far: xxxx
* 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