Saturday night we set up at a club I've played a bunch of times. There's only one 20 amp circuit to power everything. The other night as soon as my band mate plugged the light tree into the same strip as my amp and pedal board I started getting almost like a oscillating sound from my amp. I narrowed the cause down to my TC Electronic Nova Delay. ( I would have posted this in the effects section but its more of a live sound issue). I unplugged the lights and the problem went away. I ended up taking the delay off the board as the funky electricity made it wig out, even when it was turned off. In fact, even when the delay was off (but still in line) the throbbing sound went silent and I ended up with no sound at all until I took it completely out of the chain. I'm inclined to think that I need a power conditioner...anyone agree with this?and anyone have a recommendation as to which one I should look at?