You can certainly use this tank as a Q-tank, but I'd recommend removing the biowheel and finding a way to keep it cycled. One disadvantage of the Eclipse systems is that you can't remove the filter.
The easiest way to keep a Q-tank cycled is to keep a small sponge/power filter in your main tank or sump and then move it over to the Q-tank when needed. That gives you instant bio-filtration. With the Eclipse system, I suppose you could keep just a filter cartridge in your main tank or sump and move that cartridge over to the Eclipse filter when you need to quarantine a fish. Another option would be to buy a cheap sponge/power filter like I mentioned above, and run the Eclipse filter empty for extra circulation. Using water from your main tank is a good idea, but it will foul quickly without a bacterial culture to process the ammonia.
The lighting you have will be fine for quarantining fish. I run a very dim light on my Q-tank, and it's on a short photo period. If you have a fish in quarantine, they are already stressed and will appreciate subdued, or low wattage, lighting.
Running the tank bare-bottom with some large pieces of PVC pipe is what I recommend. The fish will use the PVC for hiding spots, and the combination of the PVC and bare-bottom make it very easy to keep the tank clean. Plus, you don't want any live rock or anything in there since it would probably die off if you have to add medications to the tank.