Den NOID help!

[Joyorchid]

I was given a gorgeous neostylis specimen plant set in a basket with lava rick. Amidst the lava rock was this little guy, he's about 6 inches tall.

Anyway, I have no idea what kind of den he is, other than the person who gifted it to me said it was an asian den and a bit must have fallen in the basket and decided to grow.

When I was watering this morning I banged the basket on the sink and the little guy came out. I have been wanting to give him a proper home of his own, so here's my chance!

Therefore, I have several questions for all you den pros:
1) can anyone give me an idea of the type of den so I can get some culture info?
2) what media is best? I want to do semi hydro but don't know if this is the right time. There have been lots of new roots in the last 2 weeks.
3) also need info re: light requirements. Currently he is living with the vandas in pretty high light.

Much appreciated for any advise!
Joy