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ThinkGeek – Sun and Moon Jars

http://www.thinkgeek.com/homeoffice/lights/994a/

Captured inside the Sun Jar are a highly efficient solar cell, a rechargeable battery and low energy LED lamps. When the jar is placed in direct sunlight the solar cell creates an electrical current that charges the battery over a few hours. This energy is then used at night to power the three LED lamps inside the jar.

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