Magnifica reef. Going back to halides! Help with # of fixtures, mount height, photo period....

[Seancj]

How much longer do you guys think I should keep these halides at 18" before, or if, I start lowering them down? I was planning on lowering them 2 inches this weekend and increasing the photo period another hour. Or should I choose one or the other, lower them or increase the time and not both?

 

[Seancj]

Look at how several of the Mags have already changed their positions when compared to the previous video from just a couple of days ago. They keep moving up to the center highest point of the tank's back glass in front of the overflow. Fortunately, I have nem proofed the overflow so they can't go over.
Wondering if this means I need to increase the light intensity by lowering the pendants? What do you guys think?