I was jamming tonight and my guitar player said he saw a light fo off in my cabinet, like it lit up. I thought he was trippin. Anyway, we were having practice and it was no louder than we usually play but, I was using a new distortion pedal and when I turned it on a light came on above the left too woofer. Needless to say I immediately disengaged the pedal and didn't see the light again. But it's not the first time it's happened. It doesn't happen all the time but its happened a couple times. What is it, what does that mean? I can only assume this is a bad bad thing. Does anyone know? It was a white light btw.