using a 2 litre bottle as a 50 watt light bulb
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4. banzemanga 1 year ago
#3 According to them, it doesn't leak when it rains. Looks like they sealed it properly.
However, like you said, the only problem would still be on rainy or cloudy days where sun light doesn't shine much.
Another limitation are buildings with multiple floors where only the top floor can take most advantage of this.
Still, regardless it was a very clever idea specially in third world countries where they cannot afford having electricity running all the time.
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Was it just me, or were all those roof's asbestos?
I don't think i'd be cutting into them personally...
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It's people like these, from every corner of the world that give me confidence in the fact that sooner or later someone will come up with an idea or discovery, that will solve the worlds energy issues. Ya gotta admit it, the world has a lot of smart people in it. 
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The fact that the bottle doesn't light up during night isn't really a flaw because it only does what it's designed for. This is actually a great idea. This would work in lots of? workshops, garages or tool sheds.
In the so called first world countries there is an commercial version of those bottles using fiber optic to? bring sun light indoor, it's insanely expensive and works exactly the same way. Smart people using junk to solve a problem is all the way a better idea.
The video is interesting, especially the final scene where they showed a "before" and "after," but for the most part it doesn't explain how it actually works. What does the bleach do in the process? How does one really make it? Why do you need to "cover the cap"? Why does one need water/bleach in there at all, rather than just a plastic opening to let sunlight in? Still, it's great that this innovation has been introduced....
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#9 my guess on the bleach is that the water they filled the bottles with is not sterile, so the bleach will prevent algae or bacteria from clouding up the water and getting the bottle dirty, which would obscure the light.
as for protecting the lid... perhaps they put some extra sealant under that film cap to make sure the water never evaporates out, and the normal original cap just wasn't good enough?
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Very nice invention indeed. Most of us probably use regular lights even during daytime and that isn't for free. Of course this is not too great in a several floor building. I guess you could make it work by using mirrors to reflect the light towards a bottle.
I know when im out in a shed or garage i am forced to turn the lights on even at daytime. Very clever solution really.
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12. Comment rated too low. Show this comment FunnyMan 1 year ago
I'll introduce them to another 'invention'. It's called the skylight.
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14. Voutelamberopipi 1 year ago
#12 and #13, why don't you two hold hands and go have a cup of stfu?
Great solution, especially for a working place.
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#12 Compare the cost of installing a skylight and the cost of these bottles.
You'll find there's a significant price difference between them yet they both produce ample light.
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18. Comment rated too low. Show this comment FunnyMan 1 year ago
#15. I agree that the cost of installing a 'proper' skylight in these circumstances would be prohibitive. But... the cost of cutting a crap hole in the roof and covering it with a crap square piece of transparent plastic which looked crap and occasionally leaked when it rained, would be comparable in price to this crap bottle idea, AND let more light through.
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This is very smart and I think it could even be improved.
I would search for a cheaper solution for the lens at first. Maybe the bottom of a glas bottle would do the work....ahhh I'm too lazy for this.
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More people have come up with this idea (or were inspired by this story).
Here you can find another movie on the bottle light. This video also explains the reason for the bleach and the cover over the bottlecap:
http://www.youtube.com/watch?v=1umwvQ_hMHQ
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22. Slap_chop_ninja 1 year ago
The bottled water works better than a simple skylight. Simply because the water refracts and diffuses the light over a greater area.
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24. richardleed 1 year ago
Unfortunately, I work on the first floor. So drilling a hole in the ceiling would probably get a lot of people upset... People upstairs don't want to advertise what color of underwear they are wearing... if any.
(118 votes)
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1. doubledesperado 1 year ago
Genius