How would you mount it? It looks like more trouble than it's worth. Plus, that's a lot of wattage for a small tank, which I am presuming you are getting it for. If it's for a larger tank, you will have a heck of a time trying to spread the light across the surface area. And if it's for a small tank, you can get the 27w Hampton Bay desklamp which is much easier to position over the tank without any mounting hardware.
Best of luck to you, whatever you do.