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Antiphon
#2
Jun6-10, 11:34 AM
P: 1,781
Not really a meaningful unit. Light that moves through space without reaching a human eye has 0 lumens. Lumens/m^2 is a measure of perceived brightness.

The closest thing to making it meaningful would be to measure the light being scattered by a fog or volume of fluid. That could be described as lumens per unit volume.