Graham, since you in a colder climate like me and many others on the board, then indoor would be the main area you grow in. I do grow some of my orchids outside, though my this time is short, only a couple of months - that's not alot. But it helps and they love it, when they're not being chewed on
Anyways ... I do grow high light plants under Flora tubes & a few CFL's they do well for me.
You need to figured out how much space you have, grow room is important, since many orchids can get to be sizable.
Your lights will depend on what your attracted to growing