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the SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela
Thanks and sorry for late reply. And I have another question. Suppose a white light laser can be obtained by combining Red, Green and Blue lasers and I shoot it thru a transparent color glass(1/2, 1/4 red per example, what color will I get? Or can a manufacture company such as Rosco produce Permacolor Dichroic Filters with 1/2,1/4 etc.. of the Red, Green, Blue?