Lux to watts 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 with area in square meters formula:

P_(W) = E_v(lx) × A_(m2₎ / η_(lm/W)

Enter illuminance in lux:
	lx
Enter light source:

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

Or enter spherical radius:


Power result in watts:
	W