Agree with White Rabbit. Love Zygos post pics when you have blooms.
Definitely do follow the link provided above but for quick reference I'll say that Zygos prefer bright indirect light, brighter than you'd provide your Phals I'd say though they can be happy in Phal conditions. They also like high humidity, at least 50% though mine are suffering but surviving between 30-40 this winter even with the humidifier on. And while I've only been growing orchids "officially" for a year now I've found my Zygos are thirsty fellas and l believe they like to be moist consistently without drying out completely between waterings (although I under-water tremendously usually allowing them to dry out and they're surviving but not thriving).