How did the kessils work for you? Also let me know how you like the radions, those could also be an option for me. My LFS was trying to get me to go with them
I had compact PC (came with red sea 35 gallon), and have upgraded that tank to radion xr15.
I have a 40 breeder with an ocean revive light (chinese BB off
amazon). Ive had it 3+ years without issue.
I have a reefer 525 with 3 radion xr30
(I will have a kessil refugium light in about an hour, but I cant yet compare them)
the pc (and any T5s) will have a softer lighting and more dispersed. No shimmer. good all over coverage.
The one xr15 tends to look like a spotlight if the rest of the house lights are off. (This is also due to having it only 4" off the water, any led you can raise up will help disperse the light)
The 3 XR30s get rid of the spotlight (because of the multiples) and have shimmer. Some like the shimmer, some don't. Kessil, I have heard, has a better shimmer, more uniform. The radions sorta have little colors all over.
If you have "hockey puck" lights you have to have more so you get more overlap without shadowing. Both the kessil and the radions try to dispurse the light, but they are still hockey pucks. I would take two hockey puck syle over 1, just to help with shadowing.
The Ocean Revive does not have the spotlight, but you have some different colors in different parts of the tank because of the spread of colored LEDs. some areas are a bit red, some blue, etc. But it still looks good to me.
ALL will grow all types of coral. All of my LEDs are turned down about half way so I don't bleach everything, so you should have plenty of power on the deeper tank with any newer LED for any type of coral (or clam or whatever)
I chose the radions for my big tank because I like the look and control (I have the reeflink which makes them wifi because I have 4 lights, 3 power heads, and 1 pump that are ecotech) I can change the color spectrum for coral growth and my viewing pleasure.
Since any of the lights will really work for your tank, I would decide what is important to you. After you get them set you never really adjust them. You do need timers.
If I was starting out again I would get a reputable BB (or other inexpensive light) and save the rest of the money for things you don't even know you need yet. When you change to your dream build (we all upgrade at some point!) then you will have a better / different idea and newer technologies to choose from. Remember that the LED lights are developing fast and in two years no matter what you buy will be obsolete and considered a piece of junk. But it will still grow fantastic corals.