Wow! Free light. No need electricity. Light refraction.
Conceived by students at the Massachusetts Institute of Technology (MIT), it does wonders to those living in developing countries.
So simple formula:
- Fill bottle with water.
- Add 2-3 spoonful of bleach (prevent bacteria & algae)
- Drill a hole in metal sheet roof, fix bottle & seal it.
Too bad sinkies can't do it except a handful of those living in the offshore island of Pulau Ubin. S'pore has 1 of the highest electricity rates in the world. Price hikes are frequent & thus a pain in the ass. However i do understand the need to price electricity appropriately so as to avoid wastage given the dire building up of greenhouse gases on the planet.
Electricity Rates around the world - i'm utterly shocked that Brazil, the Philippines, Solomon Islands & Tongo have electricity at least 37% more expensive than S'pore at time of this writing. Electricity is a luxury in those countries given the income level of their general populace.
SOLAR bottle light as its name indicate it depends on sunlight. When is at night is back to kerosene lamps or whatever for those folks. Nevertheless being free & so cheap & environmentally friendly the upside far outweight the 'doesn't work at night' downside.