Question

1 lux = _______
1. 0.1 lumens / m²
2. 1 lumens / cm²
3. 1 lumens / m²
4. 0.1 lumens / cm²

Answer 1

Correct Answer - Option 3 : 1 lumens / m²

The derived SI unit of illuminance is the lux (lx) or lumens/m².

1 lux = 1 lumens / m2

Quantity	Unit
Luminous energy	lumen second (lm.s)
Luminous flux/luminous power	lumen (lm)
Luminous intensity	candela (cd)
Luminance	candela per square metre (cd/m2)
Illuminance	lux (lx)
Luminous emittance	lux (lx)
Luminous exposure	lux second (lx.s)