Dracula orchids for a vivarium?

[Nish07]

Heyas,

My vivs are usually kept between 72-80 degrees with 80-100% humidity. My tank has 18 inches to work with but I'd rather not have the plant take up all of that nor all of the 12 inches of width in the smaller tanks. Would this still work well and if there are others what are they?

Thanks for the reply,

-Nish