Solar powered lights work according to a incredibly simple principle. They acquire the light from the sun and change the energy it contains into electricity which is used to charge a battery. When it becomes dark a light receptive switch causes the solar light to come on. The light is powered by the electricity stored in the battery and will continue to be lighted until all the charge in the battery is utilized.

This is simple in theory but the machinery required to make this happen is not so simple and only lately it has become promising to make solar lights that are small, efficient and economical enough to be affordable by most consumers. Each light or set of lights will have a very small solar panel to grasp the rays of the sun. The solar cells in the solar panel utilize the photovoltaic effect to convert the light they collect into electricity. Special electronics then uses this electricity to charge the battery, which is usually part of the solar panel or light unit.

The solar cell is the most essential part of the technology used in all solar panels and it is continually being studied to find better and more economical ways to convert sun light into electricity. Over time this will certainly be improved upon and solar lights will then become much brighter and illuminate for much longer. The light sensitive switch and the electronics which controls the release of the battery's electricity are fairly standard components although over time they too will be enhanced to offer more efficient solar lighting for everyone.

The solar panel, whether a separate mini panel or incorporated into the light unit, must be fixed so that it receives sun light during the day. If it is located in the shade it will not work. However the solar panels on most outdoor solar lights will now work on cloudy days though not quite as well as on a day with a clear sky.

Science and technology and improved construction processes means that development of solar lights will continue far in to the future, so expect to see more and more innovative uses for solar powered lights especially when the power and concentration of the light beam is improved beyond what it is now. Whichever way you look at it solar powered lights are here to stay and will only get better with time giving us all the chance to light areas outside our home with zero electricity costs, which has to be a good thing.