lights convert sunlight into electricity and then store that electricity
during the day so that it can be emitted at night in the form of light
once again. It is an interesting process converting light into electricity
and then back into light and is unfortunately not very efficient. The
brightness of the light is in direct proportion to the size of the photovoltaic
panel that is used, the larger the panel, the more energy that can be
produced and stored, which results in brighter lights at night.
Most solar lights have their own individual solar cells much like small
personal solar powered calculators. They generate enough power to be
lit for most of the night, and recharge every sunny day. These are used
more for lighting driveways and walkways because they are not very bright.
Solar powered spot lights usually have a much larger solar panel. On
some models the panel is installed in an area with good light and then
a wire is run to the actual light and battery.
Solar lights are a good alternative to wired lights. They are easy
to install, most require merely inserting them into the soil or attaching
them to a wall to work. There are no wires that need to be buried and
most models don’t even have an on or off switch, they automatically
turn on as it gets dark. They also provide free light, no extra power
is used so utility bills stay low.