Bought this item through Musician's Friend. I took it out of the box and plugged it in. Nothing. I then had to take it apart and found that the hot glue used to seal the 120v connections had caused the wire connection to the AC plug to not make contact. This fixed I then found that the first light would light, but the color bank would not sequence. Evidently this unit had never been tested before it was shipped from the factory! I didn't even bother to send it back. It wasn't worth the trouble. Maybe I can use the bulbs. At least they worked. I'll probably never buy another Chauvet product again.