Guess I will be the odd man out. No MH or T5, I run entirely VHO on my 90. 2 actinic white, 1 super actinic and 1 454 on 2 IC ballasts. SA & 454 on at 2, whites come on at 3 and off at 10 with the SA / 454 off at 11. I have thought about going to 2 250 MH, but the tank is doing so well, I may just add another bulb and save my money.