Published on September 14th, 2011 | by Priti Ambani48
An Innovative and Cheap ‘Solar Bottle Bulb’ Solution Lights Homes in Manila
Thousands of poor homes in Manila have a problem, not uncommon for cramped and small settlements. These houses are so close together, with metal roofing that all the light is blocked off and no light reaches the homes even during daylight!
The solar bottle bulb, (also covered here by Sustainablog, our sister site) an innovation developed by students of the Massachusetts Institute of Technology, inspired by the Appropriate Technologies Collaborative, is helping poor communities in developing countries like Brazil and Philippines through simple and appropriate innovation.
What is the Solar Bottle Bulb?
It is a simple bottle bulb, usually a 1 liter soda bottle that is filled with a solution of purified water and bleach. The bottle is inserted halfway through a hole drilled in the metal roof and its sides are sealed. The whole deal looks like a bulb through a sunroof and provides a good amount of light by deflecting sunlight into gloomy interiors.
The chlorine and bleach “poisons” the water to keep molds from developing so the solution can last up to five years. The clear and purified water helps disperse the light through refraction, so the light is not concentrated. It only costs $2-3 to make a solar bottle bulb that is bringing light to dark homes.
What are the Advantages and Disadvantages of the Solar Bottle Bulb?
This simple innovation is not perfect- the water needs to be replaced every five years and obviously without any provision for energy storage, the bulb will not work at night. But the advantages are overwhelming for communities that are deprived of daylight. It is surprisingly effective, using cheap and locally available materials that allows the poor in these settlements to use their homes more effectively. The bulb does not produce any harmful pollutants and also reduces the dangers from faulty and temporary electrical connections that cause devastating fires.
“Isang Litrong Liwanag” Project In Manila
Per the Philippine Daily Inquirer, the idea is actively being promoted by MyShelter Foundation Inc. in the Philippines under its “Isang Litrong Liwanag” Project which means ” A Liter of Light” and it was launched in San Pedro, Laguna province early this year. Isang Litrong Liwanag is a Philippines-based organization aiming to build indoor lighting in one million homes throughout the country by 2012. The Manila City government shouldered the expenses for making the bulbs while MyShelter Foundation trained residents on how to make them.
Associations like the Appropriate Technology Collaborative create new sustainable technologies that promote economic growth and improve the quality of life for low-income people worldwide.
We design, develop, demonstrate and distribute affordable technological solutions that empower people and promote dignity. ATC works in collaboration with local talent and other nonprofits (NGOs) to create market based solutions that are culturally sensitive, environmentally responsible and locally repairable in order to improve the quality of life and reduce adverse impacts on the environment.
This project and its success is a great example of the ‘market-based’ solutions that should be pursued for socio-economic problems worldwide, strategies that are smart, effective & resourceful.
Update: HOW TO MAKE A SOLAR LIGHT BULB?