I had the same thing happen to my plant. I pulled the light off of it, watered it and made sure to spray the leaves with nothing but water. A couple weeks later, the ends of those leaves were still brown, but the rest of the leaf was nice and green, I simply brushed off the dead ends and continued growing. You might have to wait a few weeks to do this though. Don't give up on either of them though. I might take a few weeks, but if the burned ends are still there, gently remove only the end of the burned leaf. The rest of it will should be healthy enough for that by then. Just remember, they are tougher than they look.