I was thinking about this and the best thing that I can add is that a few people in the New England area grow them. I have seen a few at shows and at the judging table.
For what it is worth, I think that the large flowered Lycastes might like cooler temperatures. Leaves of well flowered plants have tended to be a darker green which might indicate grown in lower light, not direct sunshine. They are often seen with algae and moss growing on both the rim of the pot, the top of the media then down the sides of the pot. I believe that they like moisture which along with lower light might indicate very good humidity. Favorite media that I recall was seedling grade bark, seedling charcoal and perlite. I do not think for example, I have ever seen one is sphagnum.
Hope this helps.