Lumens To Watts Calculator

Enter luminous flux in lumens: lm
Enter light source:
Or enter luminous efficacy in lumens per watt: lm/W
   
Power result in watts: W
  • Lumen:

Lumen is the SI unit of luminous flux. It is a measure of the total amount of visible light from a lamp or light source.

  • Watt:

 Watt is the unit of power. Power of 1 Watt is the product of current of 1 Ampere and voltage of 1 Volt.

  • How to Use Lumens To Watts Calculator?
  1. Enter the luminous flux in Lumens.
  2. Select the source of light. E.g: Halogen Lamp, LED Lamp.
  3. Click on the calculate button, you will get power in Watts.
  • Lumens To Watts Calculation:

P(W) = ΦV(lm) / η(lm/W)

Where,

P(W)  =Power in Watts

ΦV(lm) =Luminous flux in Lumens

η(lm/W)= Luminous Efficacy in Lumens per Watt.

Lumens To Watts Calculator

Luminous flux result in lumens (lm) Light source Luminous efficacy in lumens per watt (lm/W) Power in watts (W)
1000 Tungsten incandescent light bulb 15 66.66666667
1000 Halogen lamp 20 50
1000 Fluorescent lamp 60 16.66666667
1000 LED lamp 90 11.11111111
1000 Metal halide lamp 87 11.49425287
1000 High pressure sodium vapor lamp 117 8.547008547
1000 Low pressure sodium vapor lamp 150 6.666666667
1000 Mercury vapor lamp 50 20
2000 Tungsten incandescent light bulb 15 133.3333333
3000 Halogen lamp 20 150
4000 Fluorescent lamp 60 66.66666667
5000 LED lamp 90 55.55555556
6000 Metal halide lamp 87 68.96551724
7000 High pressure sodium vapor lamp 117 59.82905983
8000 Low pressure sodium vapor lamp 150 53.33333333
9000 Mercury vapor lamp 50 180