For my next tank upgrade (shallow tide pool scheme), I want to come as close as possible to the natural lighting as seen in this video.
Of course, metal halides are the first to come to mind. Go with 6500K or 10,000K? 250/400/1000 watt bulbs? How many reflectors to cover 78" x 78" foot print?
Kessil lights also come to mind and with enough fixtures tuned full spectrum, maybe they could come close.
The 6500k Iwasaki in 250 watt would very closely replicate this. I think I still have one downstairs.
Kessils turned to full spectrum are highly annoying with too much red. I have them now and run them blue. You can't get the white quality with a kessil that you get with an Iwasaki metal halide. No chance.
I could sit there and watch that video all day for some reason.