One tip...make sure whatever venue you're playing at actually requires you to bring any lighting. I know it sounds obvious, but...
We did a NYE show in Milwaukee this past year, where our drummer (who was basically an idiot) _way_ overestimated the size of the vneue. This was partly due to miscommunication between himself and the bar/restaurant owner, but we ended up playing in a bar area that was only about 15 feet by 30 feet...held about forty or fifty people _max_. Anyway, the drummer was way overzealous, and booked a lighting and sound guy, which was totally unnecessary because we had our own PA, and our guitarist has an entire lighting rig (four trees each with four cans, robotic control, sound sensors, the works...). Anyway, it ended up being that the sound guy could only set up two cans...but they were they huge barrel sized lights, probably at least 12" in diameter each...best part was they were aimed directly at the drummer, and were HOT. Ended up being turned off by the end of the second set (out of five sets).
So, yeah...just make sure whatever gig you're doing actually requires any kind of lights...we would've been fine with just the house lights in the above instance.