Glow Brick Light Bulb Glows in the Dark

Heres a cool light source that doesnt need batteries, you dont need to plug it into the mains, in

Heres a cool light source that doesnt need batteries, you dont need to plug it into the mains, in fact all you need is light! During the day the Glow Brick Light Bulb absorbs light. When nightime comes the Glow Brick Light Bulb glows with the light it absorbed during the day.

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