| Jay,
I'd stick the Cattleyas and Oncidiums on the part of the shelf closest to the window and keep the Phals back on the part of the shelf furtherest form the window.
I little wrinkling of bulbs is probably nothing to worry about, but the low humidity may require more frequent watering (see my comments in yoru humidity thread).
Regarding the 350 reading on the light meter: I dont' put much stock in light meters. I have never used them and have, for more than 10 years now, gone by "high" "Medium," and "low" light designations. I seem to recall another forum member havign light meter readings thrown way off by some sort of glazing on the window yet her orchids performed as they should eventhough the light meter said they were getting somethign like 10% of the amount of light they should have received. i would go by the plants' performance not a light meter reading.
Keep us posted on yoru progress!
Cheers
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