well the more i see vhos the more i like and from what i see it seems there becoming extinct. I looking for something to compliment my t5's and i was curious about adding some vho's. I heard ice cap ballast are the way to go, but someone said today they went out of business. How far can vho's penatrate in water and still be effective? Right now i have a 120gallon wide... i have a ati t5, 6 bulb setup (48inch) sitting in my canopy. my tank is almost 24inches wide so i have alot of room on each side for more lighting. I was pretty much told today that my t5's werent efficient enough and wouldnt grow corals and just cause more complaints. Im not sure if i agree with that but i think maybe the vho's may compliment the t5's and maybe if not happy down the road i can remove the fixture and add some mh's. Im really looking for some help and a few idea about what i have so far.... I was thinking about having 2-4 bulbs of vhos and im curious if i would need the 430 or 660 ballast. I read what each ballast is capable of, but im really looking for peoples thoughts and experience. thanks Jerrad