They look REALLY healthy to me! Usually the reddish or purple hue is due to lots of light. I'd say, leave it and the plants will accustom theirselves to the light. I don't think you have a problem. (BTW, really green Phal leaves could be a symptom of too little light also.)
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)
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