Get smart curated videos delivered to your inbox.   SUBSCRIBE
The Kid Should See This

How to make a Moser Lamp: 60 watts of free, natural light

Watch more with these video collections:

In 2002, Brazilian engineer Alfredo Moser invented a simple way to bring the sun’s light indoors: fill a clear plastic 2-liter bottle with water and two capfuls of bleach, then make a hole in the roof and secure it with a waterproof sealant.

The result: 40 to 60 watts of free, natural light.

each bottle is equivalent to 60 watts
How does it work? The bleach keeps the water from turning green, and the water refracts sunlight. To see this innovative but simple invention in action, watch the the ecoideasnet video above. Chilean Miguel Marchand helps to install the bottle lights, or Moser Lamps, in the home of a family that lives in the Andes.

adding the bottle to the roof
Around 1.6 billion people — 25% of the Earth’s population — live without electricity, but with this simple idea, they can enjoy sustainable light in their home for free. Moser Lamps are becoming popular solutions in the Philippines, India, Bangladesh, Tanzania, Argentina, Fiji, and other countries, and give an incredibly useful second life to plastic bottles.

moser lamp
If you make a Moser Lamp, please contact us by twitterfacebook, or email to let us know.

h/t BBC News. Updated video.

Related watching: La casa ecológica de botellas, and more videos about sustainability.

This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content.

Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.

🌈 Watch these videos next...

How To Solve Every Global Crisis

Rion Nakaya

The Maya Milpa Cycle, a sustainable forest gardening method

Rion Nakaya

How do you rescue good ideas from the Valley of Death?

Rion Nakaya

From Trash to Space Hippie: Nike shoes made from waste

Rion Nakaya

What if there were 1 trillion more trees?

Rion Nakaya

Barbara Franc’s scrap metal badger sculpture

Rion Nakaya

The Future of Food: Can we create the “perfect” farm?

Rion Nakaya

The Soil Food Web, claymation shorts by Maxwell Helmberger

Rion Nakaya

How to make a face shield in 3 easy steps

Rion Nakaya