Lots of sun...temp min in winter of 15 C with daytime 20 or so. They are quite hot in the summer months. I must admit, I keep these at my work greenhouse so they grow next to the Vanda. My house does not get enough light...oncidium alliance are the main ones I grow at home along with the slippers.
Joanne, that two-tone one is quite compact...maybe 9"...I expect it has a lot of the variety compactum in its genes. The other two have canes close to 2 feet.