I have an 54G corner tank. Basically an isocelles triangle with a bowed front. I want to get a coralife or orbit hqi light for it. I do not want to hang the light from the ceiling so how can i fit this lamp to the tank using the legs. Problem is the light cant touch the glass top so i need a way to mount it. Are the legs on these lights adjustable or only fit the ends of the light? Sorry for making it sound complicated, thanks for your help!?