Phot
Phot (ph) is an outdated physical unit of illuminance from the CGS system of units . With the introduction of the SI system of units , the Phot was replaced by the Lux .
It applies
- 1 ph = 1 lm / cm 2 = 10 4 lx
Phot (ph) is an outdated physical unit of illuminance from the CGS system of units . With the introduction of the SI system of units , the Phot was replaced by the Lux .
It applies