The Sun and Moon Jars are available at thinkgeek for $29.99.
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Inside the Sun and Moon Jars are highly efficient solar cell, a rechargeable battery and a low energy LED. When the jar is put into direct sunlight, the solar cell creates an electrical current that charges the battery over just a few hours. This energy is then used at night to power the LED lamp inside the jar.
The jar is frosted so the light is diffused and gives the appearance of sunlight coming from the sun or a cool moon glow. A warm colored LED light is used to give a more natural and warm light. There are no switches on the Sun Jar-in fact there are no visible controls at all. However, there is a clever light sensor inside that automatically activates the LED when it gets dark or the lights are turned out.
These mason jars are not only pretty but are very watertight so they can be used outside. They would make a perfect garden light or night light for a child's room. The Sun and Moon Jars need direct sunshine to work. Leave the jars in a sunny window or outside for several hours to charge. The Jars use a standard AA rechargeable battery, which can be replaced. Available in three colors yellow, blue, or pink. They are on sale now so be sure to buy yours today.