I am fortunate enough to have 8 foot ceiling height. If there is no room to work under the lights, then there isn't much benefit to this.
If you only have roll back - without vertical movement, make sure they can roll back so far that you can actually get up in between the lights and the tank (the lights would end up behind you while you are working). Then, all you need is to install some lights up in the ceiling so you can see what you are doing.
I would love to see somebody else use my design. I'm quite proud of it!