They make each tile out of a non-toxic and recyclable polymeric compound they themselves developed, and the tiles allow for sunlight to pass into a hidden bank of photovoltaic cells without the human eye being able to tell they are translusent.
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A typical 6-meter solar street light ranges between 30W to 100W, depending on these key factors: "Think of solar street lights like night watchmen – their power needs depend on how long they need to stay alert and how bright their 'eyes' should be. ".
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Solar panels do not need ultraviolet (UV) light to generate electricity. Standard silicon solar panels respond to wavelengths from about 400 to 1,100 nanometers, which means they primarily convert visible light and near-infrared light into power.
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Current commercially available solar panels convert about 20-22% of sunlight into electrical power.
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