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How Much Energy Does an LED Light Use?

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With the advancement in lighting technology, LEDs provide more light across a wider area at a lesser cost. However, how much energy does an LED light use? We’re going to look into factors such as location, wattage, and type of LED to identify how much energy an LED actually consumes.

How Much Energy Does an LED Light Use?

The amount of energy LED lights use depends on the wattage and how long you’re going to operate your lights. If you’re using a 60-watt LED bulb for around 2 hours, that means your light is consuming up to 120 watts.

However, light-emitting diode lights use 75% less energy than traditional incandescent lighting, so factors like the voltage, type of LED light, dimming capacity, and light configuration can also influence your energy usage. Let’s now look into how you can estimate the energy consumption of your LED lights. 

Futuristic tunnel shaped walkway

LED Light Energy Consumption in Watts 

Watt refers to an electrical power that equates to 1 joule per second. Simply put, a LED light’s rated wattage indicates how much energy the light uses.

Traditional lights use wattage to specify the expected brightness. For example, a 25-watt incandescent bulb can produce around 150 lumens. On the other hand, LEDs can use the same or less wattage yet generate high lumens per watt.  

Wattage5 to 9 watts60 watts13 to 16 watts42 watts
Lumens per watt 75 to 100+ LPW13 LPW60 LPW18.5 LPW

Computing Kilowatt-Hour Consumption of LED Lights 

When checking your electricity bill, you will notice a portion showing your household’s energy usage in kilowatt-hours. To identify how much energy an LED light uses, you can also consider the kilowatt-hour measurement, which quantifies the amount of energy consumed over a period of time.

You can calculate this by multiplying the kilowatt of energy consumption by the total number of hours you’ve operated an LED light. For instance, you have 10 pieces of 100-watt LED bulbs. To get the kWh for the whole month, you need to do this calculation: 

10 bulbs x 100 watts = 1,000 watts or 1 kW of lighting

12 hours of daily use x 30 days per month = 360 hours of use

1 kilowatt x 360 hours of use = 360 kilowatt-hours of energy consumption

Outdoor pool with LED light fixtures

LED Light Energy Costs

To identify how much your LED light’s energy usage will cost you, you need to check your LED light’s wattage and the kilowatt-hour rate on your electric bill. 

First, you need to convert the bulb’s wattage by dividing it by 1,000. After that, multiply the kilowatts by your household’s kWh rate. For instance, if you have 60-watt LED bulbs and your kWh rate is 15 cents: 

60 watt-hours of energy / 1,000 = .06 kWh

0.06 kWh x 0.15 cents = 0.009 cents 

Therefore, your 60-watt LED bulb consumes 60 watts of energy and about 0.0009 per hour. This may not seem much, yet the collective rate increases depending on how long you will keep the lights on. However, switching to LEDs can help save 50-60% in energy costs.

Factors That Affect Energy Consumption of LED Lights

While the watts identified in the package or product description of each LED bulb play a major role in knowing how much energy it actually uses, other factors may influence overall energy consumption.

  • Hours used per day: Refers to how many hours you use an LED light on average each day. The longer you turn on an LED light bulb, the more power it uses.
  • Voltage: LEDs take 120 volts of alternating current (AC), which comes into your home. Small transformers will decrease the current to about 24 volts of direct current (DC). Thus, the transformers won’t lose much of the power in conversion and can still use most of the voltage to run the lights. 
  • Cost of electricity: Electricity costs vary depending on the country or state. In some cases, residential energy costs differ from commercial or industrial rates. Last year, American residential customers spent an average of $115 in monthly electricity bills, yet you can decrease that depending on the wattage of your LED lights. 
  • Cost of bulb: While LED lights with higher wattages tend to be more expensive, they also come with longer lifespans. Hence, you get to save on energy usage when your LED light can withstand years of operation without the need to add wattage. 
  • Dimming capacity: If you can dim your LED lights, you may also reduce energy consumption. Dimmed lights mean operating at a reduced brightness, which also equates to less power or wattage.
  • Light configuration: This factor depends on the LED configuration’s length, like in an LED strip. For example, if you want to get about 550 lumens, you’ll need 5 to 6 LED bulbs. 
Wall using energy efficient LED lights

Related Questions

Here are a few facts to help you understand LED lighting better.  

Can LED Lights Burn Out?

In general, LED lights contain a rated life of 25,000 to 50,000 hours. While they do not completely burn out like fluorescent bulbs, they tend to degrade and dim over time. The light’s diode will produce less light as time passes.

Can I Leave LED Lights On All Day? 

One of the best things about LED lights is that you can leave them on all day or longer periods of time while ensuring low heat output and minimal power usage. High-quality LEDs have long-lasting powers to run even for 24 hours and 7 hours a week.

Do LED Lights Require Special Fixtures?

In most cases, you can use any fixtures and replace them with LED lights. However, some fixtures don’t have dimming fixtures or old circuit boards, making them incompatible with some LED lights. In addition, enclosed fixtures aren’t suitable for LED lights, as LEDs need ventilation to dissipate heat.


A LED light’s rated wattage determines how much energy it will use. While LEDs are cheaper and more energy-efficient than other kinds of lighting, be sure to consider your light’s wattage, location, as well as how many hours you need to use the LED light when computing energy consumption.