كهربائي power in watts (W) to luminous flux in lumens (lm) حاسبة and how to احسب.
Enter the power in watts, luminous efficacy in lumens per watt and press the احسب button to get the luminous flux in lumens:
* the predefined luminous efficacy values are typical / average values.
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)
