I just closed Oklahoma tonight and something weird was happening during the show that gave me fits. I rented some source four par lights with 575 W bulbs (at least that is what the company claimed that they had in them... I'm still convinced that they had 750 W bulbs... anyhow... during the first scene the two pars that were plugged into channel one of my board kept raising and dimming, raising and dimming, raising and dimming...... This kept up until I had the light person hold the bump button until I could figure out what was going wrong. At the next blackout I quickly reprogramed our board's "full lights" memory to get rid of that channel so we could ease up on the bump button. My question... What causes that? I just had the NSI 4600+ dimmer pack fixed the week before (the fuse holder cracked and we replaced it with a new one.