MH Christmas

During the transition you will want to start with the halides on for maybe 4 hours the first couple days, then 6 hours, then 8, and so forth. Otherwise the sudden increase in light will cause your corals to bleach. You should also be ready to rearrange everything if needs be. When you up the light intensity that much some corals will prefer to be slightly shaded, but you'll also still need to meet their flow requirements as well. When I upgraded form 4 65watt pc's to 6 54w T5's I had to shade many LPS and even some SPS corals to keep them happy after a couple weeks. To put things in perspective when I was running PC's i gad to have any SPS in the top 4" of water just for them to survive, they weren't growing fast or well by any means. Now with T5's I can grow SPS on the sandbed 28" down from the surface of the water. So the amount of difference was huge. Just watch your tank carefully for bleaching in the coming days as you increase the time the lights are on and you should be fine.

I'll be interested in seeing what you think of the lights from there.  I was looking at those as possible replacements for my Hamilton pendants for my frag tank.