The 2nd and 3rd pictures look like sunburn. I brought a large healthy catt home from our orchid society's sale table this past Sunday. It was from one of our top growers and was beautiful looking. However the leaves were darker green than I am used to which to me indicate less light. However it is in spike. I left it on a ledge in a west facing Low E window for all of two days in an effort to isolate it from my other plants for a while. Thank goodness I noticed it when I did because it was already turning black like your 3rd photo from sunburn on the most exposed leaf. It sounds like you did just move them to more light. They may need to slowly adapt if the difference is quite extreme.
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