I am surprised nobody is asking what types of corals the OP is planning to keep.

Once the coral type is determined, we can then begin to recommend some lightning options.

Most of the LED's will work no matter what type of coral is being kept because the lighting intensity can be dialled back.

With that said, if he plans to keep SPS, I would shy away from LED's if maximum coloration is the goal. I don't know why but LED's are just not there yet if you want world class coloration. MH or T5 is usually a better choice.

He stated that does not want to be limited with the lights he chooses so I assumed mix reef including sps

I am planning on focusing mostly on SPS so I definitely need a light that is more than capable.

We planning to build a shallow cube (24x24x18) as a display tank in our showroom.

I purchased a 24" Giesemann Spectra 400w SE that also includes 4x24" T5.

I will run a 400w 20K Radium MH and ATI Blue Plus T5 for actinic.

Best of both words. :mrgreen:

That's my combo. But I run 2 x Radium :)

You have great taste. :lol:

Just hope I'm not being greedy with 2 bulbs! It's a lot of light!

I've seen a bunch of Kessil tanks and you can't go wrong with them. I haven't really seen any other commercial LED fixtures that do it for me for various reasons. It's why I built my own a few years back :)