rdursch, "What are the differnces between, 1) MH, 2) VHO, 3) acitin, and 4) coarl life..."
Sometimes it can be preferance.
MH, higher k, wattage, brighter lights, deeper intensity and is great for hard corals.
VHO, (Very High Output), lower watts, good k
Actinic, blue hues
We have:
1 MH, 250w...