Metal Halide Question

[codycummings]

I recently purchased a used 24inch Metal Halide coralife pro fixture... with a 36inch tank.. how high should i hang the fixture above the tank to provide sufficient spread of the light?

[Amphiprion]

I say the closest I would get is 5-6 inches, but that is all going to depend upon what the corals were under to begin with. If it was a big upgrade, I'd raise it higher.

[codycummings]

They were under a coralife pc system with actinic bulbs.. so i am going to acclimate them to the halides by slowly increasing the amount of time they are only and the height of the lights... but i was just wondering when i should stop lowering them