noun
- Plural of phot; units of illumination equal to one lumen per square centimeter.
Usage: technical; physics; rarely used in modern practice; replaced by the lux in SI units
Examples
- The laboratory measured light intensity in phots before the adoption of metric standards.
- Early photometry equipment was calibrated using phots as the standard unit.
- The physicist converted the old readings from phots to lux for the modern report.