I am attempting some anthotype prints using some transparencies that I have printed. I mixed some dyes with tomato leaves and germanium petals with isopropanol. Of course, I do all this mixing, and then realize that I don't have a spot that stays sunny all day long during the late-fall and winter months. I have access to a long-wave and short-wave UV light source. Will UV light tend to bleach the pigments or is it better to use the full spectrum of sunlight? I know that complimentary colors will tend to bleach each other out, which makes some sense, but most of these pigments also absorb in the UV. I am currently leaving it overnight under the UV, but if it is worthless to do so, I can go save some bulb life.