Power consumption & Energy usage of LED lamps

The energy usage of LED lamps is much lesser than that of CFL lamps or fluorescent lamps or incandescent bulbs. It can produce 80-100 lumens/ watts which is almost 5 times higher than the lumens/ watts capacity of incandescent bulbs (16 lumens per watt). By using LED lamps at home, you can reduce electricity usage. Moreover, LED bulbs have a life span of 25000hrs which is 50 times that of incandescent bulbs.

Enter the wattage, hours of usage, and cost per kWh. The energy usage calculator for LED gives you the total energy consumed by the LED. Also, you can find how much power LED lights use. To check the current electricity price per kWh in your region refer to Global Electricity rates. It is necessary to enter the right cost per unit(kWh) to find the exact price.

Energy usage of LED

Average usage hours per day:
Cost per unit*:(Global Electricity rates)
Electricity usage per hour:
Electricity usage per day:
Usage cost per hour:
Usage cost per day:
Usage cost per month:
Usage cost per year:
*The cost is currency independent and same that of cost per unit input given.

Power consumption of LED lamps

LumensTypical LED Watts 
400 – 5006 – 7W
650 – 8507 – 10W
1000 – 140012 – 13W
1450-1700+14 – 20W
2700+25 – 28W

Terms and definitions:


Power usage of the device in watts shall be mentioned on its label.

Cost per unit:

The average cost per unit charged by the electric utility. Every country has different tariff rates. Visit: Global Electricity prices for details if you don’t know how much the utility company charges you per unit or kWH.

Units per day:

The number of units of electricity consumed by the load every day considering the entered operation hours.

Hours of usage:

The number of hours the load is used per day.

The electricity usage depends on the wattage and the number of hours of usage. The utility company charges you for the total kilowatt-hour of energy you have consumed. Kilowatt-hour is the product of the power consumption of the load and the number of hours of usage.

Energy usage of LED - power consumption of LED

Replacing incandescent bulbs with LED lamps can help you cut down your energy usage costs by 70 percent. They can last up to 20 times longer than incandescent bulbs.

A 3-watt led bulb can produce 250 lumens of light which are equivalent to that produced by a 25watts incandescent bulb. 3 watt led bulb has a power consumption of 3 watts per hour.

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2 thoughts on “Power consumption & Energy usage of LED lamps”

  1. Do LED lamps require a power surge to start up?
    Someone suggested its better to leave them on all the time rather than switch them off when not in use.
    Thank you.

    • Led lamps do not need ballast. Also its never a good idea to eave them on all the time. If you decide to do so, you are simply wasting energy.


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