bud blasts on neofinetia

[LinhT]

Hi all,

I got a freebie Neofinetia falcata 'Tamagawa' from the owner of the place I buy my orchids at. He was kind enough to give me one that had a little spike on it. I got to see the buds come out and grow bigger and got all excited. Well, now 1 of the 3 buds has dried up and another looks like it may be on its way to blast. This is my first Neofinetia so I'm of course bummed out! I have it in an unhindered east window, on cloudy days its 6 - 8 inches under the 55W CFL. Humidity is 50 -75 %. Day temps 71 - 85 degrees F and night temps 62 - 68 degrees. It's in the moss mound in a clay pot and gets watered every 3 - 4 days. I put it outside one day under a dark screen but the humidity that day I think was low (under 40%). So is several hours of low humidity enough to blast the buds or am I growing this plant all wrong??

Thanks for any info!