Phot, Illuminance

A phot (ph) is a photometric unit of illuminance, or luminous flux through an area. It is not an SI unit, but is equivalent to 10000 lux. Read more >>

I want to convert:

Microlux
-
Millilux
-
Lux
-
Kilolux
-
Lumen per square metre
-
Lumen per square centimetre
-
Foot-candle
-
Phot
-
Nox
-
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. Read more >>