I live in your neck of the woods and grow a Vanda hybrid indoors under a Jungle Dawn LED bar year round. It's potted in wine corks with a layer of Orchiata bark on top and watered daily. Media and roots are pretty much completely dry after 24h. Got the wine cork idea from Dustin of Here But Not who grows indoors with no humidification even further north than us.
I've separated the two Vandas that were communally potted and added the top layer of bark since making
this post, but the larger of the two is putting out another spike as we speak!