I replaced a bunch of T5 bulbs shortly after we moved in, and a year later was facing another $3 -350 to do it again. At that time, LEDs were really being hyped, especially the Radions. I didn't like the cost, but they sounded good with all the control, and success people were having with growing corals. So when J&L put them on sale on Boxing Day (2011), I jumped on the bandwagon and bought 3 of them for my tank.
But how do I fit them into my enclosed tank canopy, with only 9 inches of room between the ceiling and the top of the tank? I didn't like any of the hanging options that were for sale and wasn't getting a lot of good ideas with my internet searches. What I really wanted was some kind of sliding rail attachment. Then I found this at Home Depot. It was almost too perfect, and cheap, too. And in the electrical dept, of all places.
http://www.homedepot.ca/product/wire...l-ivory/911637
I cut them to size, drilled holes and mounted the rail sliders to the Radion fixtures (using the supplied eye bolts), and the channels to my canopy ceiling.
With the channel and railings, the fixtures can be adjusted fore and aft for lighting preference, and can be easily removed for cleaning.
So, that took care of that. I later added another tank downstairs and used the same lights and mounting system.