There is a chance that a VHO will operate in a normal fixture. It will not give any more light than a $1.00 bulb though.
Get a good VHO ballast and do it right
I LOVE the IceCap 660's from this site. I have 4 of them and they seem to last a Looooong time and do a great job.
Safer* than other ballasts too.
* - I will be happy to expalin in detail if desired.
Guy