How deep is the tank? If you still have the ability you could return it for a Fugeray - still a lot of light compared to tubes.
You could also raise the light or cut it down with a strip of window screen. The endcaps of both way models come off (2 little screws) and the clear plastic splash shield slides out. Cut some fiberglass window screen to lay on that shield ( a little smaller than the plastic) and slide everything back in with the screen on the inside)