Here we have very interesting and creative idea. A usual practice in Third Word countries and a smart money way.You only need an empty plastic cola bottle, water bleach to create your own smart solar bulb which provides 55 watts of light. Below, there are the list of materials and video tutorial for this amazing project.If you want to save some extra money, bookmark this project and try to make it when you have enough free time.
You can have a question in your mind what do you get with sunshine and plastic bottle filled with chlorine and water? According to a group of MIT students, you can get a 55-watt solar bulb that refracts sunlight and powerful enough to light up a room beside that it is inexpensive, easy to make and environmentally friendly.