Hanging D120 LEDS without drilling my walls?

[Dlo132]

I just purchased a set of d120's online, and need a way to hang the darned things. I have a metal snand for my tank, so drilling brackets to it is not going to happen either, (although i could clamp them if needed). Any suggestions are greatly appreciated. (Tank is a standard sized 90 gallon, and 2 fixtures).