Bottle-bulb” is a day lighting system that is used to light up houses that are poorly lit during the day.
You will need:A liter bottle, 995 ml of distilled water, 5 ml of bleach, Roof and Sunlight.
Add 995 ml of water and 5 ml of bleach in 1 liter soda bottle.
Then, mount the bottle on the roof where the light is needed. and with the help of sunlight the water and bleach will react to create a 55 watts of light!!!