Correct me if I've missed your point....
It kinda looks like a lot of fixtures I guess. But it also looks to be 48" x 72" of tank surface area....or more.
- They have 1600 watts worth of fixtures....about 66 watts per square foot. I'm sure they can blast that tank with 100,000 lux.
- My Razor is 160 watts....giving me about 35 watts per square foot, and around 50,000 lux, on my main tank.
- My DIY fixture (30º lenses) on my other tank is 39 watts....giving me about 13 watts per square foot and 14,000 lux.
That seems like a normal/proportional amount of fixtures for what they must be trying to do....but certainly I think most of us could get by with a normal quantity.
(That tank has an unrealistic quality about it to me.....something about the corals being so uniform I think.)