Phalaenopsis orchids should have NO sunlight shinning on it with the possible exception of a little morning light for no more then an hour.
You should NEVER grow any orchid with a companion plant of ANY type including another orchid. Their watering requirements are just way too different!
Phalaenopsis grow equally well in clay or plastic, the watering frequency is adjusted for the pot type.
Direct sunlight = any sunlight that directly shines on the leaves of the plant.
