I have read that old incandescent lamps do emit UV-Vis-NIR in a 1%-15%-84% distribution. As far as i know, the sun is sort of 5%-45%-50%. Is there any cheap and commercially available source of light that may "simulate" the sunlight we receive at Earth's surface in wavelenght distribution terms? The aim is to compare two photocatalysts.

Guess I could also use the sun itself... (but would have to perform all my experiments at the same time, which seems a little unorthodox, and also overcome substance evaporation/volatilization).