Answer: It can be tricky to provide "bright" light, as so many plant books recommend, but no direct sunlight. I have this problem myself, with just a few windows to choose from. My solution has been to get very sheer curtains--the kind that let most of the light in, but provide some privacy. This seems to be a good compromise for my plants. You could also try getting some of that reflective film that people put on their window, to reflect some of the heat. I haven't tried that, but I imagine it allows lots of light through, which you want, but helps cut down on the heat, which you don't. You may be able to find this film at department stores.
A friend just mentioned she's heard of "orchid screens". These are framed pieces of a lacy fabric that you hang in the window using suction cups. They filter the light for the orchid, and look lovely to boot! You might search the web, especially the orchid sites, and see what you find.
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