need help catching blenny

[jason604]

Man so many of my sps got bleached at the very top parts if them. Is this cuz they got burnt by my led without water protecting them? I normally turn my lights to about 5% when I do big water change but this time I forgot to for about 10mins. The whole top half of my birdnest is now fully white. Here a pic of my tri-colored nana with its tips bleached. Will they ever recover or should I snip it off?