# Lumens to watts calculator

Luminous flux in lumens (lm) to electric power in watts (W) calculator.

Enter the luminous flux in lumens, luminous efficacy in lumens per watt and press the Calculate button to get the power in watts:

 Enter luminous flux in lumens: lm Enter light source: -- select light source -- Tungsten incandescent light bulb Halogen lamp Fluorescent lamp LED lamp Metal halide lamp High pressure sodium vapor lamp Low pressure sodium vapor lamp Mercury vapor lamp Or enter luminous efficacy in lumens per watt: lm/W Power result in watts: W

* the predefined luminous efficacy values are typical / average values.

Watts to lumens calculator ►

## Lumens to watts calculation formula

So The power P in watts (W) is equal to the luminous flux ΦV in lumens (lm), divided by the luminous efficacy η in lumens per watt (lm/W).

P(W) = ΦV(lm) / η(lm/W)

So

watts = lumens / (lumens per watt)

or

W = lm / (lm/W)

#### Example 1

What is the power consumption of a lamp that has luminous flux of 800 lumens and luminous efficacy of 25 lumens per watt (lm/W)?

P = 800 lm / 25 lm/W = 53 W

#### Example 2

What is the power consumption of a lamp that has luminous flux of 1100 lumens and luminous efficacy of 15 lumens per watt (lm/W)?

P = 1100 lm / 15 lm/W = 73 W

#### Example 3

What is the power consumption of a lamp that has luminous flux of 1400 lumens and luminous efficacy of 15 lumens per watt (lm/W)?

P = 1400 lm / 15 lm/W = 93 W

#### Example 4

What is the power consumption of a lamp that has luminous flux of 1900 lumens and luminous efficacy of 15 lumens per watt (lm/W)?

P = 1900 lm / 15 lm/W = 126 W

#### Example 5

What is the power consumption of a lamp that has luminous flux of 2000 lumens and luminous efficacy of 15 lumens per watt (lm/W)?

P = 2000 lm / 15 lm/W = 133 W

### Lumens to watts table

Lumens Incandescent
light bulb
(watts)
Fluorescent
/ LED
(watts)
375 lm 25 W 6.23 W
600 lm 40 W 10 W
900 lm 60 W 15 W
1125 lm 75 W 18.75 W
1500 lm 100 W 25 W
2250 lm 150 W 37.5 W
3000 lm 200 W 50 W

Lumens to watts calculation ►

## Features of Lumens to watts Calculator

Our Lumens to watts Calculator allows the users to Calculate Lumens to watts . Some of the prominent features of this utility are explained below.

#### No Registration

You don’t need to go through any registration process to use the Lumens to watts Calculator. Using this utility, users to Calculate Lumens to watts as many times as you want for free.

#### Fast conversion

This Lumens to watts Calculator offers users the fastest Calculate. Once the user enters the  Lumens to watts values ​​in the input field and clicks the Calculate button, the utility will start the conversion process and return the results immediately.

#### Saves Time and Effort

The manual procedure of Calculator Lumens to watts isn’t an easy task. You must spend a lot of time and effort to complete this task. The Lumens to watts Calculator allows you to complete the same task immediately. You will not be asked to follow manual procedures, as its automated algorithms will do the work for you.

##### Accuracy

Despite investing time and effort in manual Calculation, you might not be able to get your hands on accurate results. Not everyone is good at solving math problems, even if you think you're a pro, there's still a good chance you'll get in accurate results. This situation can be smartly handled with the help of a Lumens to watts Calculator. You will be provided with 100% accurate results by this online tool.

##### Compatibility

The online Lumens to watts converter perfectly works on all operating systems. Whether you have a Mac, iOS, Android, Windows, or Linux device, you can easily use this online Tool without facing any hassle.

###### 100% Free

You don't need to go through any registration process to use this Lumens to watts Calculator. You can use this utility for free and do unlimited Lumens to watts Calculate without any limitations.