phot

A unit of illumination equal to one lumen per square centimeter.

Abbreviations of photographic

[lowercase or cap.] of photography.

A proposed photometric unit equal to an illumination of one lux for one second; one lumen of light-flux applied to a surface of one square meter for one second of time.

A photometric unit of illuminance, or luminous flux through an area (symbol ph).

to photograph

a unit of illumination equal to 1 lumen per square centimeter; 10,000 phots equal 1 lux