Do Not Cut! Bend only at this point. You can put a screen a few inches away from the light and just let the chamber fill up all twisty like. It won't hurt a plant at all to run into a wall and have to change direction.

Note: if you bend too much and hear a snap, don't panic. If you are fairly fast, even if the stem or branch is broken completely in two, put it back together as closely as possible to original and wrap some masking tape around it. Prop it up as needed and it will heal. Believe it or not. That is unless you've got some kind of pussy weed that can't handle itself in tough situations.

Also bend in increments. A little one day, a little more the next.