Solar Powered Motion Lights Offer An Affordable Exterior Lighting Option
Solar motion lights provide a great means of lighting specific areas and improving the security of your home. They include a PIR (passive infrared) motion sensor, coupled to a rechargeable light source.
Perfect for backyards, paths, driveways, sheds and garages, solar motion lights need no external power source or servicing and should last for a very long time before they need to be replaced. Not having to wire these lights to an external power source makes installation very easy - you just attach the light, together with its solar panel and motion detector, to an adequate wall or post and you're done!
Solar motion sensing lights generally use an array of powerful LED lights to provide illumination. LEDs are popular because they use very little power and last for many years without having to be replaced. It is typical to find models using a cluster of between 25 and 80 separate LEDs. 40 LEDs produce roughly the same light as a 12 watt halogen bulb. Also, they're very safe, since no high voltages are needed, and the lights produce no appreciable heat. If you want more powerful illumination, you can simply install more lights.
The majority of solar motion lights use a detachable solar panel to provide the power to charge the batteries contained in the unit. Given that it's separate from the other components of the light, this allows you to position it in the best place to get maximum sunlight - so you can place the light itself in a shaded area without any problem. Although the majority of units are designed to be postioned high up on buildings, etc., some are available which have stakes which can be driven into the soil, providing a lower-level light.
Passive infrared detectors are the standard means employed by these lights to detect movement. It is possible to position the sensor so it points to the most suitable area. A 180 degree field of view is normal, with motion detection out to between 30 and 80 feet.
Good quality models will permit you to set both the duration of illumination when the device is triggered, and also the range at which motion will be detected. They will also only switch themselves on when a certain degree of darkness is reached, in order to avoid needlessly draining the battery in during daylight.
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