coins-912719_640By now, you already know that LED light bulbs boast of a number of remarkable benefits, especially when compared to traditional lighting solutions. Much has been said about how energy efficient they are, but just how much can you save when you switch the lights in your [city] home to LED lighting?

First, let’s go over some facts about LED light bulbs.

1. LEDs generally use between 30 to 80 percent less energy than conventional incandescent light bulbs, halogen lamps, and compact fluorescent lamps

2. LEDs have a lifespan that’s 3 to 25 times longer than regular light bulbs

And while the initial price of LED lighting is usually higher than traditional light bulbs, these energy efficient lights cost less to use, saving you money over the long run. In addition, because LEDs are so long-lived, you won’t have to replace them as often.

Calculating Savings

When calculating your savings from switching your [city] home’s lights to LEDs, you must first consider the following factors:

  • Amount of electricity consumed by your lights
  • Current cost of electricity
  • Amount of time the lights are in use


1. Amount of Electricity Consumed

First, let’s take the number of light bulbs in your home. The average household in the United States reportedly has more than 40 light bulb sockets—larger homes having more—according to a study by Energy Star.

Now, the kinds of light bulbs in a household can use anywhere between 25 watts to 100 watts, but for the sake of uniformity, let’s assume all light bulbs in your [city] home are incandescents that use 60 watts of electricity.

Therefore: 40 light bulbs x 60 watts = 2400 watts (total light wattage)

Let’s compare to that to other light bulb types. Again, let’s assume all bulbs generate the same level of brightness.

Light Bulb TypeEquivalent  wattageTotal wattage for entire
Incandescent light bulbs60 watts2400 watts
Compact fluorescent lamps (CFLs)14 watts560 watts
LED bulbs8 watts320 watts


2. Current Cost of Electricity

Now let’s factor in the cost of electricity. The average rate paid by U.S. residential consumers in 2013 was 12.13 cents/kWh. This means that if you used 2400 watts of electricity an hour, it would cost you 29.11 cents.

3. Amount of Time Lights are in Use

Again, for the sake of uniformity and easier calculations, let’s assume that each of the 40 lights in your [city] household is switched for an average of 8 hours a day, for 30 days. That’s a total of 240 hours a month.

Now all we have to do is multiply the number of kilowatts used, by the cost per kilowatt-hour, and by the number of hours used, or:

kW used x Cost per kWh x Hours in Use = Total Monthly Lighting Costs

(Divide wattage by 1000 to get kWh)

Monthly cost of Incandescent Bulbs Monthly cost of CFL BulbsMonthly cost of LED Light Bulbs
2.4 x 0.1213 cents/kWh x 240 = $69 .56 x 0.1213 cents/kWh x 240 = $16.30.32 x 0.1213 cents/kWh x 240 = $9.31


So, if all 40 of your incandescent bulbs were switched to LEDs, you could save $59 a month. If you went from to CFLs to LEDs, you would save $6.99 per month.