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

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.

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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].

Broiler chicken's growth rate in three different nocturnal lighting regimes

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.

Renewed research for seasonal affective disordeR

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.

Lighting

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Unit of illumination