candlepower
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Candlepower (abbreviated as cp or CP) is a unit of measurement for luminous intensity. It expresses levels of light intensity relative to the light emitted by a candle of specific size and constituents. The historical candlepower is equal to 0.981 candelas. In modern usage, candlepower is sometimes used as a synonym for candela.
Key facts
- Unit.name
- Candlepower
- Unit.image
- Candle.jpg
- Unit.caption
- The candlepower was based on the light emitted from a candle
- Unit.standard
- international standard (obsolete)
- Unit.quantity
- Luminous intensity
- Unit.symbol
- cp
- Unit.units1
- SI units
- Unit.inunits1
- 1 candela (modern definition)
via Wikipedia infobox
Wikidata facts
Show 3 more facts
- conversion to SI unit
- 1.0114
- unit symbol
- cp
- inception
- 1860-00-00
Sources (1)
via Wikidata · CC0
~4 min read
Article
6 sectionsContents
- History
- Calibration of lamps
- Modern use
- See also
- Notes and references
- Further reading
Candlepower (abbreviated as cp or CP) is a unit of measurement for luminous intensity. It expresses levels of light intensity relative to the light emitted by a candle of specific size and constituents. The historical candlepower is equal to 0.981 candelas. In modern usage, candlepower is sometimes used as a synonym for candela.
==History== The term candlepower was originally defined in the United Kingdom, by the Metropolitan Gas Act 1860, as the light produced by a pure spermaceti candle that weighs and burns at a rate of . Spermaceti is a material from the heads of sperm whales, and was once used to make high-quality candles.