2 litres Pet bottle can be use as 50watt light bulb (in the day)

Solar Light with no cost

This is one of the most amazing solar powered hack I have ever seen. It only requires one 2 litres Pet Bottle, 10ml of Bleach, and a full bottle of clean, filtered water.

It will only be applicable if your house/garage is a single level, but this is the common style for people in 3rd world countries. This is changing life of people in many countries. Check out the video below:

So, what do you think ?