Solar motion lights provide an ideal way of lighting specific zones and increasing the security of your home. They contain a passive infra red motion detector, joined to a rechargeable light source.
Perfect for driveways, paths, outbuildings and backyards, solar motion lights require no external power or upkeep and should remain serviceable for a number of years before you need to replace them. Not having to wire this sort of light to a power source means setting them up is particularly simple - you just have to affix the light, together with its accompanying solar panel and motion detector, to an appropriate post or wall and that's it!
Solar motion sensing lights usually use a group of several bright LED lights to provide their illumination. LEDs are normally used because they use hardly any power and will last for many years without requiring replacement. It is typical to come across units using an array of up to 100 separate LEDs. 40 LEDs create roughly the same light output as a 12 watt halogen bulb. Also, they are very safe, because no high voltages are required, and the lights produce no significant heat. If you'd like more powerful illumination, then you can simply purchase more lights.
Virtually all solar motion lights utilize a detachable solar panel to provide the power to charge up the batteries contained in the device. Since it's separate from the other elements of the device, this enables you to position it in the best situation to receive maximum sunshine - consequently you can locate the actual light in a shaded area without any problem. While most units are intended to be fitted high up on buildings, etc., quite a few are offered which have stakes that can be driven into the ground, providing a lower-level light.
PIRs are the typical means used by these devices to detect movements. You are able to position the sensor so that it points to the most appropriate area. Most PIRs used will have a 180 degree field of view, and will detect movement out to between 30 and 80 feet.
Good quality types will allow you to set both the duration of illumination after the unit is triggered, and also the distance at which movements will be detected. They should also only switch themselves on when a particular level of darkness is reached, so as to avoid unnecessarily depleting the battery in during daylight.
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