Place a moveable floor light behind a plant and tilt it upward to create shadow patterns of the plant's foliage and shape on the ceiling and upper wall.
Position your plant in front of an overhead light that has a narrow beam to illuminate and highlight the plant. This produces an especially dramatic effect for larger plants and trees.
Place a lamp with a colored shade behind your plant to create a warm glow in various colors.
Use bulbs of different colors behind your plants to generate different moods. White light creates a sense of energy and crispness. Red, yellow and orange shades communicate warmth. Blue and green shades give off a cool, peaceful glow.
Arrange spotlights in your yard to point toward focal trees and plants in order to showcase them at night.