Watts to lumens calculator or conversion

Enter power in watts:		W
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
Luminous flux result in lumens:		lm

Watts to lumens calculation/conversion

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

The luminous flux Φ_V in lumens (lm) is equal to the power P in watts (W), times the luminous efficacy η in lumens per watt (lm/W):

Φ_V(lm) = P_(W) × η_(lm/W)