Compare lighting system options.

Comparison should include

• factors that influence lighting selection
• photoperiodism needs
• types of systems
• incandescent
• light-emitting diode (LED)
• high-intensity discharge (HID) (e.g., metal halide, high-pressure sodium)

Process/Skill Questions:

• How does light affect photoperiodism?
• How can flowering be manipulated by lighting?
• How does light color, intensity, and duration affect plant growth?
• When is one type of lighting system preferable over another?