Lux is the basic unit of illuminance in the International System of Units (SI). Lux measures the amount of luminous flux per unit area. Lux (lx) is defined as one lumen per square meter (lm/m2). 1 lx = 1 lm/mm2.
1 Nox is equal to 1 Millilux or 0.001 Lux (SI unit). Lux measures the number of lumens within an area of one square meter. 1 nx = 0.001 lx.