Here is something very interesting that can come out of a water-filled 2 gallon bottle and 2 lids full of water: a solar light. The method is very simple, just fill up a 2 gallon bottle with clean water, 2 lids full of bleach and a camera film dispenser to protect the lid from the sun, then attach it to the ceiling/roof. No switch needed, and the room - especially the one that has very limited windows for the sunlight to get in - will be lighted at the day time when the sun shines. The electrical light bulb is still needed for night time use, but this method will definitely save a lot of electricity energy (and bills) since you don't need to work the electrical bulb the whole day!
Check out this video.
Monday, May 30, 2011
Economical Solar Light out of 2 Gallon Bottle
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