I have the glo t5ho's they have one reflector for 2 bulb. they work great! so well I actually removed 1 pair for a while on my 30L with no effect on the coral. I have mostly soft coral, but my caps and slimer continue to grow as well. Get what you can afford, a single reflector setup entry level price will be 4-500 bucks. I only paid 125 for both of my dual t5's 36".