Isang Litrong Liwanag = One Liter of Light, if you guys wanted to know. MyShelter Foundation brings light to the poor, one liter at a time. Their vision is to light a million homes by 2012.
Solar Bottle Light is an alternative source of daylight, powered by the natural light of the sun. Powering up to 55 watts. The solar bottle light is inexpensive, and made from recyclable materials, which are easy to assemble.
The purpose of the bleach is to kill algae which would otherwise grow in the bottle and block the light. It is brilliant science / technology. This innovation has been around for some hundreds of years. Before electricity, many ships would have holes cut into the deck and hull and fit them with prisms that refracted light and brightened up the hold so sailors could actually see worth a damn.
It's a great idea using old bottles too.
People who do not live in these countries are not aware of:
1) Homes are made of unreinforced adobe or cement or bricks & may be many years old. It’s difficult to add any windows.
2 ) Some homes r touching each other there no option for window there
3) Many roofs made of corrugated metal. (Metal in waves) This cannot support much weight. Metal also expands & contracts everyday with heat of the day & cold of the night. A skylight would have problems pretty quickly.
The fact that the bottle doesn't light up during night isn't really a flaw because it only does what it's designed for. For the same reason a bicycle shouldn't be criticized for it not being able to run on water but only on solid surfaces.
Dudes new hobby is making creepy shopping lists and dropping them in random people's shopping baskets at Costco. I think this is the shopping list of that 
