What is main difference btw lumens (given by light specs) and ft candles?Do they have any math relationship?

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What is main difference btw lumens (given by light specs) and ft candles?Do they have any math relationship?

2007-09-16 12:54:57 · 1 answers · asked by mickael828 1 in Science & Mathematics ➔ Engineering

1 answers

One lumen is the amount of light that will
give a brightness of one footcandle on a
square foot of surface.
Lumen is a unit of radiant energy.
Footcandle is a measure of brightness
or radiant energy density.

2007-09-16 16:24:04 · answer #1 · answered by Irv S 7 · 0⤊ 0⤋