But why does the CCD cam amplify the light of the cathode filament wires? Hmm, maybe it isn't amplifying it... could it be that the cathode filament wires emit IR?

Heh, cool. The CCD is picking up infrared (as they all tend to do). Neat pictures!

A simple infrared filter gel (available at camera stores) over the camera lens should take care of the problem just fine.