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Solar-Powered Motion Lights
Solar motion lights deliver an ideal way of lighting certain locations and increasing the security of your property. They include a passive infrared movement detector, joined to a rechargeable light source.
Excellent for yards, paths, drives and garages, solar motion lights require no external power source or maintenance and will remain serviceable for an extremely long time before they have to be replaced. Not having to wire these lights to a power supply means setting them up is particularly easy - you simply need to affix the light, together with its solar panel and motion detector, to a suitable post or wall and that's it!
Solar motion sensing lights generally utilize a number of bright LED lights to provide illumination. This is because they require hardly any power and will last for many years without the need to replace them. It is normal to find lights with an array of up to 100 separate LEDs. 40 LEDs produce around the same light as a 12 watt halogen bulb. They are also especially safe, because no high voltages are required, and the lights generate no appreciable heat. If you'd like more powerful illumination, you can simply add more units.
Virtually all solar motion lights utilize a detachable solar panel to produce the power to charge the batteries contained in the unit. Because it's not attached to the other elements of the device, this allows you to locate it in the best position to receive maximum sunlight - this means you may locate the actual light in a shaded area without problems. Though most units are designed to be mounted high up on walls, etc., quite a few are offered which have posts which may be driven into the ground, providing a lower-level light.
Passive infrared detectors are the usual method used by these devices to sense motion. You are able to position the sensor so it points in the best direction for your purpose. Most PIRs used will have a 180 degree field of view, and will detect movement out to between 30 and 80 feet.
Quality products will allow you to set both the duration of illumination when the light is turned on, and also the distance at which movements will be detected. They'll also only switch themselves on when a certain level of darkness is attained, so as to avoid unnecessarily draining the battery in during daytime.
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