Last year while I was bui8lding my new house, I rented a darkroom about the same size as yours equipped with the big Thomas light. I experienced extreme fogging (I watched the image come up and then watched it go completely black)with Oriental VC paper. I had to get a small red light from the darkroom manager to complete my printing session. He called me later and confirmed that the thomas was fogging paper.(posted 8920 days ago)Based on that experience, I did not purchase a new safe light for my new darkroom, but contine to use the $10 red safelight I picked up used about 10 years ago. The Thomas has too much output for a small darkroom.