Using soda bottles as light bulbs replacement in Philippines

[gregschlom]

http://www.physorg.com/news/2011-09-bottle-brighten-millions-poor-homes.html

[felipemnoa]

Does anybody know why they are adding bleach?

[byoung2 → felipemnoa]

Probably to add a bit of diffraction to the incoming light, and to discourage the growth of algae/bacteria.

[slug → felipemnoa]

so that the water doesn't turn "green" I assume. anyway, I've seen these many times over and it has been on HN several times over.

[smoyer → felipemnoa]

"The bleach prevents mold growth so that the bulbs can last for up to five years."