The lumen, abbreviation lm, is the SI derived unit of luminous flux. It is the amount of light that falls on a unit area at unit distance from a source of one candela.
... the average family size is 3.44.
In the town the population is spread out with 25.6% under the age of 18, 7.5% from 18 to 24, 33.8% from 25 to 44, 21.3% from 45 to 64, and ...