After so long, I've managed to get my enlarger set up. Other than replacing the halogen bulb, everything seems to work fine. However, I can seem to read the filter settings at all. The illumination is very dim. Is there a bulb that I need to replace for me to be able to comfortably read the filter settings on my CLS head? I can't seem to read that in the manual. I know it's a separate bulb as the filter illuminates, albeit very dimly, even without the halogen lamp.