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: