Archaic noun for a light or lamp, now largely replaced by modern terms like 明かり or ランプ. Found in classical texts or fixed expressions.
In old documents, 燭 means a light or lamp.
candela (obsolete unit)
Historical unit of luminous intensity, approximately 1.0067 candela. Used as a suffix in compound measurements. Obsolete in modern science.
燭 is a unit of luminous intensity used in the Meiji period.
portable candlestick
candlepower
holding a lamp in one's hand · early evening; dusk
bright light; brilliant torchlight · wedding ceremony
The kanji 燭 originally depicted a torch or candle. The reading しょく is the on'yomi. The historical unit sense derives from the brightness of a standard candle.