## 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

Calculatebutton to get the power in watts:* the predefined luminous efficacy values are typical / average values.

## Lumens to watts calculation formula

Energy saving lamps have high luminous efficacy (more lumens per watt).

The power P in watts (W) is equal to the luminous flux

Φ_{V}in lumens (lm), divided by the luminous efficacyηin lumens per watt (lm/W):

P_{(W)}=Φ_{V(lm)}/η_{(lm/W)}## Lumens to watts table

Lumens Incandescent

light bulb

(watts)Fluorecent

/ 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

## See also