Deep vs shallow frag tanks

[Palmer]

I am guessing the pic above was your deeper tank. I have seen pics of that tank in the past.

Perhaps this subject is a no brainer (shallower is better) but I was interested in it after I saw a you tube video of "tidal gardens" greenhouse and how they raise their corals.

I would imagine in aquaculture some of the rationale for set up would also be risk mitigation. A shallow tank seems obvious to me for light penetration. The thing I was wondering about was if you have a variety of coral with different requirements can too little depth become a risk with lighting as either bulbs age and you replenish them or even if you switch between different types of lighting?