Bringing back the metal halides

[FishOkay]

Ive bought a couple of 400w metal halide fixtures, only one hung as the Supplier didnt have a second hanging kit so waiting on that to hang the second, but it will be to the right. What would be the best hanging height for them? Thanks

 

[Snowxcross]

Interesting setup! You'll have borrow a par meter to really tell, but start a little higher and see how your corals react, then adjust if needed.