Any chance they got splashed or misted with any fluids? That mixed with strong light can cause bleaching/burns and discoloration. If it's only on the one leaf or two it's probably not too much to worry over, if you see a spread then some changes would need made.
Experiment green might be onto something there as well.. like growing is a little bit like guessing with accuracy... You kind of react to what the plants do. That's what I do anyway.