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Illuminance
In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of the intensity of the incident light, wavelength-weighted by the luminosity function to correlate with human brightness perception. Similarly, luminous emittance is the luminous flux per unit area emitted from a surface. Luminous emittance is also known as luminous exitance.
1 lx
is equal to
1,000 mlx
-
1,000,000
-
1,000
-
1
-
10-3
Lumen per square metre (lm/m²)
1
Lumen per square centimetre (lm/cm²)
10-4
-
0.09
-
10-4
-
1,000