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How Do Solar LED Street Lights Work?

2022-07-21 15:06
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How Do Solar LED Street Lights Work?


If you’ve ever been on any street in any part of the city, you’re likely going to encounter street lights. These public infrastructures are extremely handy sources of light, especially at night when there aren’t much light sources around, and these can at least help you navigate while walking, while driving, or even while commuting. What can be interesting, however, is if you see street lights in various rural areas or areas you could swear don’t have any electrical grids. What’s up with that? In cases such as this, you’ve most likely encountered a solar LED street light.


Are solar LED street lights a worthy investment, though? Solar LED lights are efficient the way solar energy is extremely efficient, especially now that the world is pushing for a more environmentally-free energy system to avoid the adverse effects of climate change. According to World Energy, just the average global solar radiation per year can produce just as much energy needed as 140m³ of natural gas, 200 kg of coal, or a barrel of oil. This means, under the right optimization process, solar energy can indeed replace modern energy sources we have today.


For some, it can be a surprising sight to see solar-based street lamps on the streets, but they do have their perks. So, how exactly does a solar LED street light work?


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Solar Street Lights: The Basics


If were to talk about the basics, then it’s obvious that solar LED street lights work by utilizing solar energy—however, it doesn’t stop there. These street lights are actually dependent on photovoltaic cells, which are the ones responsible for absorbing solar energy during daytime. These cells eventually convert this solar energy into usable electrical energy that can power the lamps during nighttime. This process repeats everyday, and potentially even be a way for the street light to have a sustainable source of energy for as long as the sun is up.



What is perhaps interesting is that a solar LED street light is actually just one of the many classifications of solar street lights that exist out there. Alongside solar LED street lights, other kinds include:



Sodium vapor street lights use sodium as the primary light source. Sodium that is kept in an excited state can discharge the light it stored, courtesy of solar panels that absorb sunlight during daytime. Batteries are there to receive the converted electrical energy – and given its rechargeable nature, sodium-based street lights don’t need any wiring. This makes them suitable for plazas, parks, residential areas, public spaces, and streets.

Induction-technology based street lights make use of lamps that don’t have filaments, and as such prevent the lamps from getting damaged faster. This at least helps the lamps have a way to have longer-lasting life. Using this technology, lamps can last for as long as 10,000 hours. Induction-based street lamps also have lower maintenance costs and generate less heat.


The Magic of Solar LED Street Lights


Solar LED street lights work with LED lamps, as in light emitting diode lamps. As such, LED-based lamps have a special compound that releases light when direct current from the source battery gets to pass it. LED street lights are practical as a lot of companies have LED lamps available in different styles, shapes, and sizes. Its durable nature also means it can last for as long as 50,000 hours. As it requires very little current to work, it also tends to be much smaller than other lamps. Likewise, the solar panels needed to make solar LED street lamps work are much smaller, and can therefore make them cheaper to build.



Solar LED street lights rely on the photovoltaic effect, which allows the solar cell to convert sunlight into usable electrical energy. This is done when negatively-charged electrons push solar energy into positively-charged spaces in the cells.

This process allows solar energy to transfer into the electrons – becoming direct current electricity. Similar to how electricity-based gadgets work, wires from the solar cell are then connected to the battery in order to transfer the fresh direct current electricity from sunlight.

It’s when nighttime arrives that the solar cell will stop the conversion process as sunlight disappears. Photoreceptors will help shut the solar cell down when there’s not enough sunlight to convert. This is when the battery will start supplying power to the LED lamp via other wiring.


Conclusion


With the above, you hopefully now have a basic gist of how solar LED street lights work, especially in areas without much access to electricity. The portable and environment-friendly nature of a solar LED street light can make them an ample replacement for ordinary street lights, and perhaps a sound option as well for areas without access to an electrical grid.


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