unit of illumination
51lamberts — n. unit of illumination (Optics) …
52candle — i. A unit of illumination for intensity equal approximately to the luminous intensity of a 7/8 in sperm candle burning at 120 grains. ii. The failure of a parachute to deploy because the rigging lines are fouled. Also called a cigarette or a… …
53foot-candle — noun a unit of illumination equal to that given by a source of one candela at a distance of one foot …
54phot — [fəʊt] noun a unit of illumination equal to one lumen per square centimetre. Origin early 20th cent.: from Gk phōs, phōt light …
55phot — [[t]fɒt, foʊt[/t]] n. opt a unit of illumination, equal to one lumen per square centimeter. Abbr.: ph • Etymology: 1915–20; < Gk phōt , s. of phôs (contr. of pháos) light …
56lux — F/A/V a contraction of the words luminance and flux; metric version of footcandle. TV A metric unit of illumination equal to the light of a candle falling on a surface of one square meter. One lux equals 0.0929 foot candle …
57foot-candle — TV A unit of illumination equal to the light emitted by a candle at the distance of one foot. One foot candle equals 10.764 lux. (See lux) …
58Lux — WikiV SI unit of illumination, equal to one lumen per square meter. Lux is a measurement in light intensity …
59foot-candela — /fʊt kænˈdilə/ (say foot kan deeluh) noun a unit of illumination in the imperial system, equivalent to that produced by a standard candle at a distance of one foot; equal to 10.763 91 lux. Symbol: ft cd Also, foot candle …
60phot — n. unit of illumination of a surface …
