I've spent a bunch of time filming at night, since it's the only time we can skate par on weekends..anyways;
Decent 160led light for the top, set shutter speed to 1/100 (lowest 1/75, if it's really dark) and set exposure to 9db at lowest, but I try to stay at 6db. I've never really had any times where I thought it was really bad, mainly because the light is pretty good.
I second the notion of a VX2, or a 21 which I always find for good prices as well. Par some shaky and orange clips in this (since this was the year I first started using my camera) this was filmed on a VX21 and was mainly at night;
Genuinely really like how VX21 looks if you soften the image a bit sometimes. Oh and the camera seems more reliable, since they are newer.