are you saying you are currently running all vho's?
That's old school man...lol
Anyone else feel like you can't beat a vho for actinic pop?
Wasteful energy, I know, but the superactinic vho's just can't compare to anything else IMO, not even t5's...
Go t5's...
If you have a canopy already, just buy a 6 bulb retrofit fixture.
It'll kill those vhos for par and penetration and they will be significantly cooler than hot running overdriven vhos.
You may be able to use you're same ballast...
http://www.fishtankshop.com/browsepr...d-Fixture.HTML