A phot is a photometric unit of illuminance, or luminous flux through an area. It is not an SI unit, but rather is associated with the older centimetre–gram–second system of units. The name was coined by André Blondel in 1921.
1 phot = 1(lumeo/ centimeter2) = 10,000 lumen/meter2 = 10,000 Lux =10 Kilolux
Illuminance = luminous intensity × solid angle / length2
Standard Units | |
---|---|
Footcandle | {{footcandle}} |
Kilolux | {{kilolux}} |
Lumen/square centimeter | {{lumenpersquarecentimeter}} |
Lumen/square foot | {{lumenpersquarefoot}} |
Lumen/square inch | {{lumenpersquareinch}} |
Lumen/square meter | {{lumenpersquaremeter}} |
Lux | {{lux}} |
Metercandle | {{metercandle}} |
Milliphot | {{milliphot}} |
Nox | {{nox}} |