Artificial Light for Orchids

Tube Length

• The United States Botanic Garden website recommends tubes at least 4 feet long to provide sufficient light for orchids. Meanwhile, the University of Tennessee article "Growing Orchids in the Home" recommends bulbs, which are typically easier to find.

Types of Light

• A combination of cool and warm light is best for orchids. Fluorescent lights working in conjunction with incandescent lights provide the most natural lighting style.

Wattage

• Orchids require 40-watt bulbs, whether they are fluorescent or incandescent. This provides light without burning the orchids with heat -- burning is a common problem.

Timing

• Lighting hours should match outdoor daylight hours. During the winter, 12 hours a day is enough, while 16 hours a day is preferable for summer. All orchids need several hours of rest each night.

Problems

• Artificial lights sometimes dry out orchids. Misting orchids in the morning, using a humidifier or placing them on moist gravel increases humidity to prevent drying.