The Science of How Solar Power Garden Lights Work

Solar power garden lights are an innovative way to lighten up any yard or lawn.  These garden light sources prove to be a good investment, as although they are quite costly they do not make use of electricity, thus helping you cut back on electric costs.  They also do not require any wiring or installation.  These solar power garden lights generate light through collecting energy from the sun during the daytime, and releasing it at night to illuminate your garden.

Solar garden lights are composed of a battery, LED light and control board.  It also has a four-cell solar array, the material responsible for collecting solar energy from the sun.  These garden lights usually light up automatically once the sun sets, this is made possible through a photoresistor, which is the same material that automatically switches street lamps on at night. 

solar power garden lights are an innovative way to lighten up

A photoresistor works by changing its resistance depending on the amount of light it is exposed to.  In the daytime when a lot of light hits it, it lessens resistance and conducts electricity well.  When no light hits it, it becomes increasingly resistant and conducts electricity poorly.  Solar power garden lights produce light through a solar-cell technology.

A garden light has four solar cells which produces 1.8 volts of electricity and different ranges of electric currents.  The range of electric currents varies according to how many solar cells there are and how much light they receive.  These solar cells are directly connected to a battery through diodes. 

A typical garden light runs on a standard AA Nicad battery.  It generates 1.2 volts and can accommodate 700 milliamp-hours.  It can fully charge itself during the daytime, except for cloudy days or during the winter season.  When night comes, the solar cells stop generating power and power is then transmitted from the solar cell and battery to the controller board.  The photoresistor then senses the light absence, and configures the three-transistor circuit to turn on the LED lights.  The LED produces an estimate of 1.23 volts taken from the battery; half the light created by a candle.  When fully charged, the LED can generate light for a good 15 hours. 

Be sure to test out these solar garden lights first before purchasing, to ensure that it is powerful enough to illuminate your garden at night.  The solar cells found in these lights are made from silicon crystals, one of the main reasons why they are quire costly.  Other Solar power garden lights varieties contain a combination of LED and halogen flashlight bulbs to increase the amount of illumination given

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