Quoted from mof:* troubleshoot controlled lamps problem (1)
After watching that video, I noticed a problem with the controlled lamps for 2x, 3x, 4x, 5x. It took some troubleshooting, but it had to be a short... Lo and behold it was the disc contraption that holds all the lights -- a bulb was grounded to that disc! Look out!
-mof
Was it the one in the center? I was concerned that could happen on mine and added some electrical tape there as an insulator.