My current tank is a rimless JBJ no hood and yeah I used the rails. In my perfect world I would build a suspension unit or hang the lights, but I have cats!!!!!!!!! The current light is a foot off the water line, acropora are placed based on their lighting needs, and the thing about higher end LED is that you can adjust the intensity lighting to meet the needs of your corals.
If my intent was to have a soft coral tank I would be happy with T5 or PC. For clams and Acorpora and other Sps you really need more intense lighting to get the growth and coloration.
AI and Radion make amazing fixtures, and controllers.
The AI Prime would be ideal for the JBJ 28, and their are a couple other nice LED fixture that would work as well.[/QUOTE