I've got a sun power 6 bulb for 75 bucks but needs reflectors and 2bulbs out of the 6 don't work I'm not sure what's the problem there but 4 bulbs do work before I took it off my tank.
I didn't bother trying to fix it or figure it out too lazy to do so I just bought a powermodual instead. That's the reason why it's 75 bucks figure new reflectors will cost you some dough and new bulbs so that's how I came up with that price tag up to you