Lux to watts Calculatrice

Illuminance in lux (lx) to Électrique power in watts (W) Calculatrice and how to Calculer.

Entrer the illuminance in lux, luminous efficacy in lumens per watt, surface area in square feet / meters or spherical radius in feet / meters and press the Calculer button to get the power in watts:

Entrer illuminance in lux:  
lx
Select light source:
Or Entrer luminous efficacy in lumens per watt:
lm/W
Entrer surface area:  
Or Entrer spherical radius:  
   
 
   
Power  Résultat in watts:  
W

Watts to lux Calculatrice

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

Lux to watts calculation formula

Lux to watts calculation with area in square feet

The power P in watts (W) is equal to the 0.09290304 times the illuminance Ev in lux (lx) times the surface area A in square feet (ft2), divided by the luminous efficacy η in lumens per watt (lm/W):

P(W) = 0.09290304 × Ev(lx) × A(ft2) / η(lm/W)

Lux to watts calculation with area in square meters

The power P in watts (W) is equal to the illuminance Ev in lux (lx) times the surface area A in square meters (m2), divided by the luminous efficacy η in lumens per watt (lm/W):

P(W) = Ev(lx) × A(m2) / η(lm/W)

 

 

Lux to watts calculation

 


See also

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