lumen constant

AlternateUnit const lumen

The derived unit for luminous flux (lm).

One Lumen is equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions.

Implementation

static const AlternateUnit lumen = AlternateUnit(
    'lm',
    ProductUnit._(
        [RationalPower<Unit>(candela), RationalPower<Unit>(steradian)]));