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• Primarily serve a security function, but there are a wide variety of systems, including: high–intensity discharge (HID) systems for mercury, metal halide and high–pressure sodium light sources; incandescent and tungsten halogen fixtures; low-voltage lighting systems; and incandescent or halogen PAR spotlights and floodlights.
• HID lighting provides considerably greater illumination than other lighting commonly available. Its cost is also higher, although operating costs for lumens output is generally less.
• Lumens are the measurement of light output.
• Fixtures to be used outdoors must seal moisture and dust from wiring and switches. Fixtures with photocells provide automatic activation from dusk to dawn.
• Spotlights or floodlights are used for security. They can also be used with a colored lend as decorative lighting. Weatherproof sockets are essential because the fixture is often mounted on the ground and pointed upward. Only install when the ground is completely dry.
• Motion lights use sensors that activate the light when they detect heat and motion up to 40 feet away. They can attach to a power pack and mount on walls or fences 6 to 8 feet above the ground.