电功率 中 瓦特(W) to illum中ance in lux (lx) calculator and how to calculate.
输入 功率 中 watts, luminous efficacy in lumens per watt, surface area in square feet / meters or spherical radius in feet / meters and press the 计算 button to get the illum中ance in lux:
* the predef中ed luminous efficacy values are typical / average values.
The illum中ance Ev 中 lux (lx) is equal to 10.76391 times the 功率 P in 瓦特(W), times the luminous efficacy η 中 lumens per watt (lm/W) divided by the surface area A 中 square feet (ft2)：
Ev(lx) = 10.76391 × P(W) × η(lm/W) / A(ft2)
The illum中ance Ev 中 lux (lx) is equal to the 功率 P in 瓦特(W), times the luminous efficacy η 中 lumens per watt (lm/W) divided by the surface area A 中 square meters (m2)：
Ev(lx) = P(W) × η(lm/W) / A(m2)
