
Originally Posted by
Sand Man
Does the source need to be the Sun? What if it's an artificial source of light like an electric bulb?
I am thinking of using plastic tubes nya adto magsubay ang tubig ngadto padung sa mga balay. Pwede kaha ni?
Something like this:

Unless those tubes in your diagram is made of fiber-optics (very expensive!) this idea will (literally) not hold water. And another is that your light source must have a candle power of at least half that of the sun (again, the closest being the electric arc produced by a welding rod) for this idea to actually work even with fiber-optics in place.
BTW, this idea will work even WITHOUT the bleach--the bleach is only there to kill algae or any living organisms that could minimize the transparency of both water and the bottle.
That guy is doing lots of things with plastic bottles--I believe he spearheaded a project wherein they used plastic softdrink bottles to build a school.
-RODION