Hi. Has anyone already done the work to back out the standard luminosity function so I can go from lumens at a particular wavelength to radiant flux in Watts? I have visible LED spec sheets with optical characteristics in lumens and I want to calculate the outputs in W. My NIR LED has specs in radiant flux in W because we can't see that. I want everything in W. I found the expression for the standard luminosity function here https://en.wikipedia.org/wiki/Luminosity_function but was hoping someone knew of a website or program that already does this. Thanks!