Hi Barb!
I have one Zygo and I'm no expert. My books tell me they enjoy morning and afternoon sun, but not a hot midday sunlight. A light green leaf with a hint of yellow indicates it is getting max amount of light...a dark green means it needs more.
Watering...they do not like to go completely dry, yet never let them be soggy.
High nitrogen fert. from Feb to July, low nitrogen fert. from Aug. to Jan. Repot every two to three years from Feb. to Jun in something well draining, like fine bark or fine orchid medium.
My first blooms since I got her are coming soon. I bought it in bloom last November.
At the very least, this will bump you to the top so others with experience can chime in. Happy growing!!!!!