I am thinking of getting T5 lighing on my 29 gallon. It is 30" long, and am not sure which size lighting I should get for it.I was thinking either a 36" fixture 6 bulbs, 24" fixture 6 bulbs, ir 3 24" 2 bulb retrofits one in the middle with 1 10K and one Actinic, one in the back right with 2 24"...