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Luminous flux
In
photometry
,
luminous flux
or
luminous power
is the measure of the perceived power of
light
. It differs from
radiant flux
, the measure of the total power of
electromagnetic radiation
(including
infrared
,
ultraviolet
, and visible light), in that luminous flux is adjusted to reflect the varying sensitivity of the
human eye
to different
wavelengths
of light.
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