I have a number of Brassia, Brassidium and Miltonia chids which all seem to absolutely THRIVE on a shelf out in the orchid room which gets direct west Florida sun through a tinted window (about 20% shading)...
they are all growing crazy roots, growths and spikes/buds!
I put both my Miltonia and my Miltoniopsis in a west window a couple of weeks ago and I'm seeing growth on both (the Miltonia is the newish project plant, but the Miltoniopsis was previously doing nothing in an east window).
Of course I don't get your Florida sun, just the UK dim, ocasional sort