[pogodzib]

Since I've always favored MH over T5s on my tanks, I hate to have to agree with Dale here, but I will. With the benefits that T5 bulbs can provide over shorter tanks, I think T5 HO bulbs are usually the best choice for tanks that are 18" deep or less. For taller tanks, I still prefer MH. It will be interesting to see what happens once the T5 VHO bulbs become more popular. BTW - I was thinking the same thing about the plant bulbs.