slow down with the calculators!
by definition,
a lumen is equal to the luminous flux through a unit solid angle from a uniform point source of one candle, or to the flux of a unit surface area all points of which are at a unit distance from a uniform point source of one candle. the intensity of one lumen per square foot equals one foot-candle .
and on PAR: it also includes green. the only difference between par and lumens is that par is filtered (with very steep skirts) from 400 nm. to 700 nm. lumens are
still a very good way to measure light intensity - some may even say better, since lumen measurement includes some uv and ir, as well.
hope that helps
