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# Watts To Lumens Calculator

 Enter power in watts: W Enter light source: -- select light source --Tungsten incandescent light bulbHalogen lampFluorescent lampLED lampMetal halide lampHigh pressure sodium vapor lampLow pressure sodium vapor lampMercury vapor lamp Or enter luminous efficacy in lumens per watt: lm/W Luminous flux result in lumens: lm

Convert lumens to watts with the online converter calculator

#### Definition Lumens & Watts

Lumens – The SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela.

Watts – Watts is a combination of Amps and volts. Watts is a measurement of the amount of energy being released. The higher the wattage is, the more power and output from the appliance.

## How to Use Watts to Lumens Calculator

Enter the power in watts.
Select the source of light. Eg: Halogen Lamp, LED Lamp.
Click on the calculate button, you will get Luminous flux result in lumens.

## Watts to Lumens Conversion

The high luminous efficacy (more lumens per watt) is used by Energy saving lamps.
The luminous flux ΦV in lumens (lm) is equal to the power P in watts (W), n times the luminous efficacy in lumens per watt (lm/W):

ΦV(lm) = P(W) / η(lm/W)

Where,
P (W) = Power in Watts
ΦV (lm) = Luminous flux in Lumens
η (lm/W) = Luminous Efficacy in Lumens per Watt.

For LED lamp with luminous efficacy in lumens per watt: 90 lm/W
20 Watts to lumen = 1800 lm
40 Watts to lumen = 3600 lm
50 Watts to lumen = 4500 lm
90 Watts to lumen = 8100 lm
288 Watts to lumen = 25920 lm
450 Watts to lumen = 40500 lm
1800 Watts to lumen = 162000 lm

#### Watts To Lumens Calculator

Power in wattsLight source EfficacyResult in (lm)
30Tungsten incandescent light bulb15450
30Halogen lamp20600
30Fluorescent lamp601800
30LED lamp902700
30Metal halide lamp872610
30High pressure sodium vapor lamp1173510
30Low pressure sodium vapor lamp1504500
30Mercury vapor lamp501500
40Tungsten incandescent light bulb156000
50Halogen lamp201000
60Fluorescent lamp603600
70LED lamp906300
80Metal halide lamp876960
90High pressure sodium vapor lamp11710530
100Low pressure sodium vapor lamp15015000
110Mercury vapor lamp505500