There's not really an inside of a black hole anyway. The black hole it self is nothing but a tiny spot yet massive in weight. There's an inside the event horizon though. Commonly people like to refer to the size of the event horizon as the size of the black hole, so that might be the "inside". In that case it's hard to tell whether it's bright or not. My guess is that it's certainly brighter looking outside than towards the singularity, which should be black, because there's no light coming from that direction whatsoever, since it all gets swallowed. Then again I'm no physicist, so I'm not really qualified to make any claims here.