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Here’s a way to brighten up enclosed spaces in an environmentally friendly way. The power of the sun is harnessed using a bottle full of water. Quite simply they’re used 2-liter soda bottles. They’ve been filled with water along with two caps worth of bleach to keep microorganisms out. The cap is then covered with a film canister to protect it from the sun. They are installed through holes in the roof, and in full sun they put out the equivalent of a 50 watt incandescent light bulb.
31 comments :
Kindly give credits to those who pondered on this project : "A Liter of Light" that gives decent lighting to the homes of poor families around the world.
https://www.facebook.com/aliteroflight/info
At risk of being a poo-poo head, this is silly. This isn't a light, it's a skylight.
unfortunately plastic bottles give off harmful gases.Perhaps glass bottles could be recycled for the job.
What about night time? I guess it not useful because there no sunlight?
Yes, this is simply like a skylight but the water in the bottle reflects the light all around the room better than any mirrors or reflective material in a skylight. Plus, the availability and cost of the materials used makes it pretty hard to beat in price. Kudos to the brains that have come up with this.
This is awsome. I'm going to do the same things in my shed!
Great idea but the uv will degrade the bottle over 1-2 years causing a very wet floor - to be considered as a great initiatives for fire skylight design though
That should have read 'future' skylight designs
If the floor is going to get wet once in a couple of years..big deal. Very wet? 1Ltr of water in a hot country. It's a great idea.
amazing all these engineering geniuses never thought of something so simple.
All you need is some glow in the dark juice in the water and you got a night light too.
err, why not open a simple window instead of screwing with the integrity and homogeneity of the roof??
Great! I am now making holes and installing these bottles all over the house.. hope they dont create leaks.... :-)
great work..
can this experiment gives light in night also????
can put a LED light into bottles and light it in night time
Will it intensify light or desperce in better in you hang it in front of a window in a dark room?
some people don't read enough:
1. If they had windows, they won't need this, yes. These are installed in homes in poor communities, in shanties where many rooms (if you can call it rooms) are windowless and dark.
2. Installing LED? please start a new topic for LED
its awesome
"The UV will degrade the plastic over 1-2 years." ... ??? Yes, and a 50W incandescent will at some point snap its coil if you leave it on 8 hrs/day over a period of 1-2 years. ??? In which case, you *buy another light bulb*. Hopefully, you can figure out where that simile's going.
I believe the LED was in addition to the liter bottle of water for night time, very low power requirements.
These communities are extremely poor with no windows or electric connections. Even in the tropical conditions people had zero light inside their houses. When the project was first conceptualized, it was completely from reused COKE/PEPSI bottles, so it was almost 0 capital. Very often the simplest ideas are the true strokes of genius. Some of the comments here remind me of the saying "If you cant affort bread, just eat cake" :)
till it rains then you would have to clean the water up...lol
originated in PHILIPPINES, too bad they didn't mention it...
PHILIPPINES is the first to discover this.
Yes, well opening a window is quite hard considering these are mainly installed in the poorer districts of Manila where families live in housing made from metal, containers and other sources. Not many windows to open. Most of them leak anyways, but I saw this and I think the guy insulates the edges with something after installing it to make them waterproof. Anyways, great idea and replacing the bottle costs less than a bulb. Great idea from the Pilipinas.
What about at night?
Kudos to those whom saw beyond a plastic bottle. To give light to those whom are without. This is a blessing. Again, Kudos.
S.G.
At night they sleep.
and during the day it's just dark inside... this is ingenious!!!
The bottles last about five years. Yes more than a bottle and bleach -- it's installed in a piece of corrugated steel, with sealant and marine epoxy. Maybe US$2 total cost. But zero daytime electricity used for five years saves 30x the cost. And no wires, no infrastructure, and readily available materials.
GREAT idea, being used all over the world!
See aliteroflight.org/index.php
made in Philippines
why bother about night, they dont party at night, you do..
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