Something that you could do would be to just make it high enough to slip your lights underneath. Thats the most common thing people do for an excuse to get a little raised on their decks.
That's what we are considering doing, our main concern is the additional weight. We're already going from 10- 300W quartz halogen fixtures to 10- 250W HPS fixtures. Adding a raised platform would add even more weight up front. We have a deck in the boat now that we hide batteries under and the lights are mounted on 2" square tubing in which we hide all the wiring and electrical connections. We'll probably stick with what have, because believe me, I need to be as close to the fish as possible.