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2. Foot-candle - Wikipedia

   en.wikipedia.org/wiki/Foot-candle

   A foot-candle (sometimes foot candle; abbreviated fc, lm/ft 2, or sometimes ft-c) is a non-SI unit of illuminance or light intensity. The foot-candle is defined as one lumen per square foot. This unit is commonly used in lighting layouts in parts of the world where United States customary units are used, mainly the United States. [ 1 ]

3. Candlepower - Wikipedia

   en.wikipedia.org/wiki/Candlepower

   In 1937, the international candle was redefined again—against the luminous intensity of a blackbody at the freezing point of liquid platinum which was to be 58.9 international candles per square centimetre. In 1948, the international unit candela replaced candlepower. One candlepower unit is about 0.981 candela.

4. Candela - Wikipedia

   en.wikipedia.org/wiki/Candela

   The value of the new candle is such that the brightness of the full radiator at the temperature of solidification of platinum is 60 new candles per square centimetre. [15] It was then ratified in 1948 by the 9th CGPM [16] which adopted a new name for this unit, the candela. In 1967 the 13th CGPM removed the term "new candle" and gave an amended ...

5. Candela per square metre - Wikipedia

   en.wikipedia.org/wiki/Candela_per_square_metre

   The candela per square metre (symbol: cd/m 2) is the unit of luminance in the International System of Units (SI). The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area. The nit (symbol: nt) is a non-SI name also used for this unit (1 nt = 1 cd/m 2). [1]

6. Candle - Wikipedia

   en.wikipedia.org/wiki/Candle

   A candle in a candle stick Tapers (long thin candles) in a church A memorial candle (yahrtzeit candle) A candle is an ignitable wick embedded in wax, or another flammable solid substance such as tallow, that provides light, and in some cases, a fragrance. A candle can also provide heat or a method of keeping time. Candles have been used for ...

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