Complete Freakin Genius! A 2 Liter bottle produces the light of a 50 watt lightbulb for free!
I LOVE LOW TECH SOLUTIONS PROBLEMS! This is amazing. Someone in Brazil had the idea to fill a 2 liter bottle of water and install in on your roof for FREE lighting! This is far better than cutting a hole in the ceiling because the water and the shape of the bottle captures the light and disperses it like a light bulb! The water also acts as an insulator! Each one apparently gives out the equivalent light as a 50 watt light bulb.