전기 power in watts (W) to illuminance in lux (lx) 계산기 and how to 계산.
Enter the power in watts, luminous efficacy in lumens per watt, surface area in square feet / meters or spherical radius in feet / meters and press the 계산 button to get the illuminance in lux:
* the predefined luminous efficacy values are typical / average values.
The illuminance Ev in lux (lx) is equal to 10.76391 times the power P in watts (W), times the luminous efficacy η in lumens per watt (lm/W) divided by the surface area A in square feet (ft2):
Ev(lx) = 10.76391 × P(W) × η(lm/W) / A(ft2)
The illuminance Ev in lux (lx) is equal to the power P in watts (W), times the luminous efficacy η in lumens per watt (lm/W) divided by the surface area A in square meters (m2):
Ev(lx) = P(W) × η(lm/W) / A(m2)
