Sunlight in a bottle - ingenuity [Article, Video]

In 2002, Brazilian engineer Alfredo Moser invented a simple way to bring the sun’s light indoors: fill a clear plastic 2 liter bottle with water and two capfuls of bleach, then make a hole in the roof and secure it with a waterproof sealant. The result: 40 to 60 watts of free, natural light. Watch the video here.