2014 New York Laws
GBS - General Business
Article 20 - (320 - 323) GAS
321 - Standard of illuminating power.

  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.