My son reported seeing this on a YouTube video, so I can't vouch for its
While bemoaning the lack of light in various African hovels and tar-paper
shacks, some residents came up with a novel approach. They cut a hole in the
substance laughingly called a roof and inserted a filled, plastic water
According to my son (who may have been drunk), the result was illumination
roughly equivalent to a 40-watt bulb! And, I guess, you could have more than
Admittedly not much brightness, but more than a 3" skylight and, of course,
it doesn't work at night.
Unless you have a flashlight serving as a replacement for the sun...
Anyway, I thought, if it works, the water-bottle concept is a clever one - a
concept that might be an interesting experiment.