The Carcel is a former French unit for measuring the
intensity of light. The unit was defined in 1860 as the intensity of a
Carcel lamp with standard burner and chimney dimensions, which burnt
colza oil
Close-up of canola blooms
Canola flower
Rapeseed oil is one of the oldest known vegetable oils. There are both edible and industrial forms produced from rapeseed, the seed of several cultivars of the plant family Brassicaceae. Historicall ...
(obtained from the seed of the plant Brassica campestris) at a rate of 42 grams of colza oil per hour with a flame 40 millimeters in height.
In modern terminology one carcel equals about 9.74
candelas.
See also
*
Jail
A prison, also known as a jail, gaol, penitentiary, detention center, correction center, correctional facility, or remand center, is a facility where people are imprisoned under the authority of the state, usually as punishment for various cr ...
, or cárcel in Spanish
References
Physical quantities
Units of luminous intensity
Lighting
Obsolete units of measurement
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