It will eventually burn/bleach/foxtail. Pick a bare part of the stalk however many inches down you wish to lower it. Pinch the stalk to soften it up so it's plyable but don't break the outer skin if you can help it. After you bend it into position it may hang there on it's own but you'll probably want to tie it down somewhere, it will try to stand back up in a few days. Then readjust your light to your new canopy level.