Watts to lux calculator

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 Formula:

E_v(lx) = P_(W) × η_(lm/W) / A_(m2₎

Enter power in watts:
	W
Select light source

Or enter luminous efficacy in lumens per watt:
	lm/W
Enter surface area:

Or enter spherical radius:


Illuminance result in lux:
	lx