Depends more on the types of orchids you are dealing with. Some orchids like Dendrobiums prefer a lot of light, whereas others like it a bit more shady. Another thing to keep in mind is humidity. Most prefer high humidity, but they don't want their roots saturated. Consequently, I would grow them as epiphytes. To do so, get some cork bark and mat it down with some damp sphagnum moss, then position the orchid on the sphagnum while making sure to spread the roots out as much as you can. Tie the orchid in place as you want it, then add some more sphagnum moss over the roots to hide the ties a little. Mist the sphagnum moss about every other day, just to keep it damp, not saturated. Give it about six weeks and your set.
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