Light burn? w/pic

I think this might be burn from light but it is in a different spot on the leaf than where I would have expected it to be and only on one leaf. I was out of town for a couple of days come home and the plant was about 6" from light (150w hps). I raised the light back up to about 10" I guess I'm just looking for some reassurance I don't have another issue going on here. This is a clone 7 days into flower I have another clone the same size I can switch out if need be. Thanks for any and all help. Here's the pic.

looks like light burn mine did the same

Yeah, I did the same thing early on, although I'm using CFL's. The burned spots are still there but the rest of the burned leaves look fine, just like yours. My guess is that she'll be fine.