I'm curious how these little 5" fluorescent lights work. How much voltage does it take to run them and am I suppose to be able to check for voltage at the tombstones. F4T5/BLB is the bulb I want to power up. Its a small black light bulb that I want to use for halloween. I used it last year with an old cordless fluorescent fixture that I had laying around but I can't get it to work anymore. Not sure how to troubleshoot it. The triac on the power board gets extremely hot. That part I do know. I powered it up with a 6vdc output wal-wart. Is there anyway to wire staight to the bulb itself and what voltage would it need?