I would tend to go much brighter than Phal light, I'd go Catt levels or even a bit brighter. Most tampensis I've seen in the wild seem to grow and most importantly for your question bloom best in bright places (like pine trees in scrub) as opposed to dim places like oaks in a hammock. I have seen them in both, but my experience seeing and growing them would tend to bright light.
My only experience with profusa is my hybrid of it with fowlieri. I grow it bright along with all my other encyclias, and have been happy with its performance.
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