Bud blast can be caused by drafts, or temperature changes. More subtly, it can be caused by the ethylene gas given off by ripening fruit, or from a very tiny leak from a gas stove. I don't think that the Phal needs, or wants, that much light. With those good roots, and a new leaf starting, it may just need to focus on growing for awhile. While Phals can be in bloom for a really long time, they don't stay in bloom nonstop. Let it grow! There will be more flowers when it's ready. No "magic fungus" (magic mushrooms???
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