Light
Orchids are also classified into three other groups depending on the intensity of light they require -- high (3,000 foot-candles), medium (2,000 foot-candles) and low (1,000 to 1,500 foot-candles). Most orchids require plenty of light, preferably at least six hours a day. Many orchids can withstand more or less than the amount of recommended light, but providing more light enhances flowering potential. Conversely, inadequate light prevents orchids from flowering, although they will grow.