I’m assuming you mean the 30w rectangle one.
Yes. I cut one half of the mount shorter so that it still used 2 screws but the overlap was reduced and allows it to be center-ish on a 10g. I’m not looking at it now, but I’m pretty sure it was the tank side clamp piece that has the threaded holes.
I used a sawzall with a metal blade, but obviously a hacksaw would work. I painted the fresh cut end with some black paint.
Light worked well. Don’t spill water on it.