Renewable energy has increasingly become the subject of discussions that seek to find causes and solutions to the rising environmental crisis and pollution. Indeed, there are no doubts that conventional, industrial production of energy is using up our exhaustible resources too rapidly.
Hence this way is far from being sustainable and in not so distant future will cause many problems of a scale larger than the one we are facing currently.
However the situation is not all that gray and hopeless as new inventions and technologies are developed by scientists who dedicate their effort to discover new more environmentally friendly alternatives.
In the past few decades, solar energy has been identified as one of the most effective of all the inexhaustible and renewable energy sources and many countries already are doing a great job in promoting households and companies to invest in solar panels. The energy collected by solar panels can be used for various purposes and one of them is to produce solar lighting. Basically, it is a lighting system that provides and stores its own energy from its own source.
This article will provide you a short overview on what exactly solar lighting IS, what type of solar lighting currently IS available and what the advantages of using solar lighting are.
The principle of how solar lighting works is actually quite simple. The physical explanation behind why it is possible to collect the solar energy and transform it into lighting lies in the photovoltaic effect which is being used in a solar panel or photovoltaic cell that is able to collect the solar energy (i.e. the energy that is produced by the Sun) throughout the day-time.
After being collected, the energy is usually stored in a rechargeable gel cell battery and used later in the evening when there is no sunlight to produce lighting.
The light is being turned on by an intelligent controller which is switching on the LED light using the energy that has been stored.
The panel itself consists of numerous layers of crystalline silicon as well as various chemicals that can make layers of negatively charged electrons and positively charged spaces.
After passing through the solar cell, the sunlight activates negatively-charged electrons and pressures them into the positively-charged spaces.
Solar lighting is mainly used to provide outdoor lighting during the evenings and night-time. It is used both in streetlights as well as can be used for smaller areas such as your garden or porch.
Apart from photovoltaic lighting, there are two other solar lighting solutions that are not as common but still serve the purpose well enough:
Solar Sky Lights.
Solar sky lights can dim and brighten indoor lighting by interacting with the Sun and clouds. This technology is a great method for saving energy spent on light as it can sense the availability of sunlight during the day and provide necessary amount of indoor lighting according to the circumstances (amount of the sunlight, clouding etc.).
These panels are usually installed on rooftops and due to specifics of usage and purpose (to provide only lighting not electricity for the whole house) they are a lot smaller and easier to maintain than solar panels meant for producing larger amounts of electricity.
Hybrid Solar Lights.
This is the newest generation technology in the market providing grid interactive solar lighting systems also known as hybrid systems. The hybrid solar lights are more complex and there are several systems available that function differently depending on whether the energy is used to power grid or lighting, or both.
Some Common Questions about Solar Lighting:
Solar-powered lights each contain a solar cell, Ni-Cad rechargeable battery, LED light and photoresistor. Essentially, each light’s solar cell produces energy, which charges the battery during the day. Solar-powered lights stop producing energy at night, so the photoresistor, which detects the absence of light, activates the battery, which turns the LED light on.
Simple installation is the best reason to choose them. They don’t require any wiring or other power sources, making it easy to place them in the ground. You’ll also be grateful when your power bill comes since these lights aren’t using electricity. Safety is another reason to choose solar lights. Since they don’t use power cords or electricity, they are safe for use near ponds or swimming pools.
The Ni-Cad rechargeable batteries will last about two years if you take care of them and periodically allow your lights to recharge. Replacement batteries can also be ordered from the manufacturer or online. The LED light bulbs will run up to 100,000 hours each and are not replaceable.
Because solar lights are powered by direct sunlight, they need to be cleaned periodically from dust or mud, so they can easily store energy for the night. They also do not work as well during the winter or on cloudy days, so you may want to store your them indoors during rainy or snowy seasons. Switch them to the off position when they are not being used and store them in a dark place.
While solar lights are designed for all temperatures, the models that include glass should not be left outdoors if you receive a lot of rain or snow. They should not be exposed to windstorms or extreme storms, either, as they can easily be damaged. You can buy hanging fixtures if you’re worried about your lights blowing away; hanging lights also work well for lining swimming pools, ponds and creeks.
Of course, if you are not familiar with solar lighting, you probably have a lot of questions in your mind related to what actually the benefits of utilising this comparatively new technology are.
To be honest, the only disadvantage of solar panels is that they are still quite costly; however since many manufacturers are now forming the competition for solar products, this technology is improving within months and now it is also possible to purchase medium-priced solar lighting systems. On the other hand, the advantages are more than just a few:
Solar energy is environmentally friendly. As mentioned, using solar lights plays a major role in reducing carbon footprint that has been created by producing energy from non-renewable energy sources. Only by slowly acquiring solar and other types of renewable energy it will be possible to decrease the problems caused by exhaustion of our planet’s resources.
Solar energy is cost effective. Although this might seem a bit expensive technology at first, by doing the right math you will see that the money saved from being paid to your electric energy provider will eventually add up and cover the costs of the instalment of the solar lighting within a matter of just a few months.
Solar energy is unlimited source. Solar energy is inexhaustible. As long as you live in a place where there is some sunlight, there is no reason why you could not acquire it and produce energy out of it.
Solar lighting systems require a very little maintenance. Solar lighting systems are one of the easiest to be maintained. Apart from doing a few check-ups and cleaning throughout the year there is nothing else much you have to do to ensure longevity of your solar lighting.
Solar lighting is available in wide range of styles. As mentioned before, solar lighting is now available in numerous types, styles, shapes, sizes etc. and has been made not only to serve the functional purposes but also to be aesthetically and visually pleasing. The range is great and there are not many doubts that you will eventually find an option that will suit your individual expectations and needs.