LIGHT
requirements vary. Deciduous species require light conditions as for Cattleyas – 2,000 to 4,000 foot-candles or 50 to 70 percent shade. More light is usually provided as new growths form pseudobulbs.
In a greenhouse, evergreen species grow best with less light - 60 to 80 percent shade.
Indoors, evergreen species need about 1,500 to 2,000 foot-candles.