N.Y. General Business Law Section 321
Standard of illuminating power

The maximum illuminating power required and minimum illuminating power permitted of gas so furnished or supplied in any such city shall be as follows: If a coal gas, sixteen candles; if a mixed coal and water gas, eighteen candles; and if a carburetted water gas, twenty candles. A candle shall mean a sperm candle, six to a pound, burning at the rate of one hundred and twenty grains of spermaceti per hour. The test for illuminating power shall be made with gas obtained from a service pipe or main located at a distance of not less than one mile nor more than one and one-half miles from any distributing holder, using, for coal gas and mixed coal and water gas containing more than fifty per centum of coal gas an F Argand burner, and for mixed coal and water gas containing fifty per centum and less of coal gas and for carburetted water gas a number seven slit union Bray burner, on a basis of consumption of five cubic feet of gas per hour.

Source: Section 321 — Standard of illuminating power, https://www.­nysenate.­gov/legislation/laws/GBS/321 (updated Sep. 22, 2014; accessed Feb. 7, 2026).

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Verified:
Feb. 7, 2026

Last modified:
Sep. 22, 2014

§ 321. Standard of illuminating power's source at nysenate​.gov

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