Lux to watts calculator

Enter illuminance in lux:  
Enter light source:
Or enter luminous efficacy in lumens per watt:
Enter surface area:  
Or enter spherical radius:  
Power  result in watts:  

The lux is measure luminous flux per unit area(symbol: lx). It is the SI unit of illuminance and luminous emittance , It is equal to one lumen per square metre.

Lux to watts with area in square meters formula:

P(W) = Ev(lx) × A(m2) / η(lm/W) provides you helpful and handy calculator resources.