Note: In this calculator radiant flux is calculated only over displayed wavelengths of 375-800nm. The Black Body Spectrum input clips the spectrum to be within 400-700nm. When using the black body spectrums the radiant flux is measured only over the 400-700nm range.
Radiant Flux is a measure of actual light output, and here it is a measure of actual light output over the given spectrum. When entering radiant flux, a rough estimate is .
Black Body Spectrum is in degrees kelvin, assumes the light source is an ideal black body radiator clipped to 400-700nm
Single/Custom Wavelength accepts a comma deliminated list of wavelengths in nm and relative weights. Example "500" means a single monochromatic light at 500nm, "500, 400, 700" means a light source with power equally distrubuted through the three wavelengths, 400nm, 500nm, and 700nm. "400:2, 700:1" means 2/3 of the power is at 400nm and 1/3 of the power is at 700nm.