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The arc lamp was the first source of electric light. Invented in the early 1800s by Humphry Davy.
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In 1860, an english physicist Sir Joseph Wilson Swan make the lightbulb longer lasting. He found that carbon paper filament works better but burns up quick.
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Thomis Edison allowed the lightbulb to glow even brighter and longer in 1878.
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In 1883 we learned how to transform sunlight to electricity
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The carbon filiment was then replaced by tungsten which lasted longer and burnt brighter.
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LEDS were first developed in the 1960s. These allowed for colored light
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The first Compact Fluoresent light was made. Allowing the light to be even brighter and more of a white color.
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the first solar powered leds available for purcahse was in hong kong
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With the availbility to sell these new lights, they allowed for better cost eficiency
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With the recent improvements on solar energy there has been record breaking amounts of new solar power.