... Tobias Wong. Just as jam jars store jam, the Sun Jar stores sunshine. You sit the jar on your ... during the day, then when it gets dark the Sun Jar automatically turns itself on and glows with the ... Just as a jam jar stores jam, the Sun Jar stores sun. Pop the jar on the windowsill in the ... low voltage bulb that glows orange, powered by the sun and the solar charging panel. An auto light-sensitive ...