Watts to lux 计算器

电气 power in watts (W) to illuminance in lux (lx) 计算器 and how to 计算.

输入 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 计算 button to get the illuminance in lux:

输入 power in watts:  
W
Select 光照 source
Or 输入 luminous efficacy in lumens per watt:
lm/W
输入 surface area:  
Or 输入 spherical radius:  
   
 
   
Illuminance 结果 in lux:  
lx

Lux to watts 计算器

* the predefined luminous efficacy values are typical / average values.

Watts to lux calculation formula

Watts to lux calculation with area in square feet

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)

Watts to lux calculation with area in square meters

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)

 

Watts to lux calculation

 

See also

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