The Solarbulb is a device that utilizes the power of the Sun, Light Emitting Diodes (LEDs) and old plastic bottles to provide up to 6 hours of continuous light. The solar bulb uses 0.18 W solar cells and attaches to ordinary bottles, which can be safely filled with water to amplify the light, and provide a stabilizing weight in windy locations. The devices are not yet for sale, but are expected to cost $20-$25 USD each and will be marketed as replacements to garden lights in the developed world, however, the concept is certainly worth investigating on a smaller, more affordable scale for use in developing regions
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