I tested the lamp voltage and the first thing I discovered was my multimeter was broken. So I can't test it yet, but I strongly suspect it's the power supply. Unless the signal to go bright isn't making it to the head. The fan powers up and the shutter opens when set to expose, just the lamp stays dim. Can you mix and match a power supply? I can't find an Eseco brand power supply but there are other ones for Omega dichroic heads that look like they would work with the Eseco gear. Can this be done?