Watts to lumens light conversion calculator
Electric power in watts (W) to luminous flux in lumens (lm) calculator with conversion formula.
How to calculate?
Enter the power in watts, luminous efficacy in lumens per watt and press the Calculate button to get the luminous flux in lumens:
Calculation formula for watts to lumens conversion
Energy saving lamps have high luminous efficacy (more lumens per watt).
The luminous flux ΦV in lumens (lm) is equal to the power P in watts (W), times the luminous efficacy η in lumens per watt (lm/W):
ΦV(lm) = P(W) × η(lm/W)