Just curious, with T5 usage increasing I would expect to see used VHO fixtures at good prices.
As far as bulb price goes, from what I've seen T5 and VHOs seemed pretty close (within a buck or two).
I am looking at buying a bigger tank in the 35x18x18-ish tall range. From what I've seen MH and T5 fixtures are about the same price for that size. A T5 will draw about as much juice as a 175 MH. Bulbs are about the same $20x4 for the T5 and $70-ish for the MH. I will probable build a canopy to match my custom built oak stand so I just want to research all lighting angles. The T5 retros are a bit expensive compared to the prebuilt T5 pendent fixtures whereas the MH retros seem less expensive than prebuilt Mh pendants.
I did notice that the new Fleet Farm in Appleton is using what looks like T5's with individual reflectors to light the store.