Hello Robert: Yes, scan backs for large format cameras are not compatible with flash units for illuminate art work. I understand the use of continous light source in your workflow. Sadly cameras with CFA sensor are more affordable than large format cameras and scan backs that fit them. And don't mention the wide affordable options in 35mm lens. Large format cameras are premier league. The institution owns a Sinar and can't migrate to digital due to crisis and expensive scan backs or medium format CFA backs. The problem with fluorescent tubes or LED lamps is that are simulators of the spectral power distribution of white (sun) light, and both show pikes. Strobes are better aproach. And can be considered as an opinion, but is demonstrable with a plot of Robin Myers's Spectrashop. Someone in this list commented that simple glass is UV cut, but only can mention his afirmation because haven't more data. Would be usefull. On the other hand the emision in the UV band is common in sun light too, and termal fluctuations can even change the response of calibration tiles, so we have to learn to coexist in this way. The next approach going to test is to work with "standard" high quality gallery light source of exhibition hall at institution. In some circles mention that is better to capture under (and/or simulate) exhbition conditions for the average human eyes. Jose Bueno