DIY Frequently Asked Questions / Outdoor Fixtures')">
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.