Unit of illumination

the light of a sperm candle burning 120 grains per hour. Standard gas, burning at the rate of five cubic feet per hour, must have an illuminating power equal to that of fourteen such candles.
- Rankine.

See also: Unit

References in periodicals archive ?
This is because birds on restricting light regimens can maintain intakes similar to those illuminated continuously by increasing their rate of intake per unit of illumination time [10,11].
The degree of dosing, usually 30 minutes of exposure to 10,000 lux (a unit of illumination), remains a question, as do the side effects, which vary among patients.
Footcandle is a unit of illumination defined as the illumination on a surface one square foot in area on which is uniformly distributed a flux of one lumen.