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Luminous intensity
What is luminous intensity?

Definition of LUMINOUS INTENSITY : the intensity of a light source as measured by the luminous flux per unit solid angle and usually expressed in candles.

Because of natural selection, the human eye has two ways it can see light. In photopic vision, the human eye is the most sensitive to green and yellow light at a wavelength of 555 nanometers.
Luminous Intensity
Candela
Luminous Questions