Overhead Indoor Water Bottle Lighting [3 Pics]

Submitted by: fancylad 4 years ago Science

Always amazed at this "invention"--does it really work this well? It"s like a 100 watt bulb.
There are 29 comments:
Male 5,413
Wouldn`t it melt the plastic?
0
Reply
Male 2
you have to put Bleach in the water to work... bleach makes light beans bounce all over... with just plain water, it would only `go thru`
0
Reply
Male 2,220
You can`t have more out, than has gone in, but with the coke bottle incident light is falling on a lot more than the cross section.

In any case the wattage is irrelevant, the difference this can make to someting as efficent as the mk1 eyeball is pretty neat. Without any of the heat problems you`d get in calcutta with 4 square metres of see through plastic..
0
Reply
Male 15,832
@spanerbulb Don`t sell yourself short. I think you understand things pretty well.
0
Reply
Male 36,469
It`s from the slums in the Fillipines, (iirc) some group trying to improve their living conditions goes around putting them in, for free of course.
Many of these women do home sewing in near darkness for income, these lights really help!
0
Reply
Male 1,243
Rick_S, not sure how a fibre optic cable can transport more light than can get in through one end, care to explain? BTW not being pissy but you seem to know your stuff and I`m interested.
0
Reply
Male 7,123
Obviously it only works in sunlight, but for people working in a shack all day this is a boon. Whoever developed it (call it an invention or not) has done a wholly good thing.
0
Reply
Female 1,566
"I have never traveled to a third world country but i will take on a bet that a Homedepot that sells, delivers and installs these PVC sheets is hard to find. "

I was responding to LazyMe, who suggested that these bottles are impractical because you could "just replace your roof with a clear PVC sheet", thus he was "imagining these in a very wrong context", aka clearly not a third-world one. Reading comprehension bro, you need to work on it.
0
Reply
Male 37,888

They needed help to figure out how to put a window in?
No wonder they`re 3rd world.
0
Reply
Male 1,540
But it still only works during the day.
0
Reply
Male 3,314
"100 watts? Not even close. The sun puts out about 1361 W/m^2. The top of that bottle has an effective cross section of no more than 100 x 100 mm, which means that the energy hitting the top of the bottle is no more that 15 W. If 2/3 of that makes it down to the bottom and out into the room, you`ve got yourself 10 W of solar energy, about half of which is in the form of visible light.

So, your 100-W pop bottle is really closer to 5 W."

Wattage isn`t a measure of how much light, but how much electricity. A 100 watt bulb might put out 1,700 lumens. Direct sunlight is 32,000–130,000 lumens/meter squared on a sunny day. Using your numbers, the surface area of the cross section would be 0.0079 meters squared, which would give between about 251 lumens and 1,000 lumens, or between 25 and 60 watt light bulb equivalent.

But I think the bottle acts a little like a fiber optic cable, and gets more sunlight than just the cross section. I`d say 1,700 lu
0
Reply
Male 527
@ leesah,

The cost of a PVC bottle (free on the trash-heap) is far less than the cost of a sheet of transparent PVC the size of a roof (you`ll pay something in the line of $25 per m2 for a 5 mm thick plate i estimate). So only a window size hole would be expensive.
On top of that, a PVC plate the size of your roof has to be very thick and thus more expensive.

I have never traveled to a third world country but i will take on a bet that a Homedepot that sells, delivers and installs these PVC sheets (a sheet the size of your roof will be to heavy to handle on your own without equipment) is hard to find.

These PVC bottle solutions are very easy to implement against very low costs.
Solutions for the third world aren`t found looking at it from your point of view with your possibilities in mind, you must look at it from their point of view with their possibilities in mind.
Remember their Homedepot is called trash-heap.
0
Reply
Male 6,737
Was the video of this not posted last year..?
0
Reply
Female 1,566
I think some of you were imagining these in a very wrong context. Why not replace the whole ceiling with PVC, really? Replace the roof of the dirt shack?
0
Reply
Male 15,832
[quote]i thought it was bleach and water...[/quote]
It is. The bleach doesn`t really affect the optical properties. It`s just to keep stuff from growing in it so it stays clear.
0
Reply
Male 27
i thouhght it was bleach and water, and used mainly in slums with no electricity/wondows. 100watts is probably what it seams like after near total darkness
0
Reply
Male 1,810
This solves a third world problem, not a first world one...
0
Reply
Male 735
invention? it`s just a bottle in the ceiling
0
Reply
Male 15,832
100 watts? Not even close. The sun puts out about 1361 W/m^2. The top of that bottle has an effective cross section of no more than 100 x 100 mm, which means that the energy hitting the top of the bottle is no more that 15 W. If 2/3 of that makes it down to the bottom and out into the room, you`ve got yourself 10 W of solar energy, about half of which is in the form of visible light.

So, your 100-W pop bottle is really closer to 5 W.
0
Reply
Male 1,292
ammonia and water*

this is also old...
0
Reply
Male 198
In areas with unstable - or highly expensive - electricity, this works. When most of the people in the areas these are used live in the equivalent of shacks, any little bit helps. Especially since the only other source of light during the day is the front door. No windows, because the 3 other outside walls of your shack are also the walls of your neighbors. I think there was a video about it here on IAB a while back.
0
Reply
Male 3,445
These are being implemented in slums. Think about the positive effect it can have on someone living in poverty.
0
Reply
Male 10,440
No, never mind. I`m being too harsh. I`m sure this has it`s uses... well done. *slow clap*
0
Reply
Male 1,284
very useful during the day, worth nothing at night
0
Reply
Male 10,440
[quote] It`s like a 100 watt bulb. [/quote]
It looks way, way too dim for 100 Watts. ... you know, today, in 2012 (if you like checking calendars), you can do much more than that with 100 watts.

... also, it looks bright because of the contrast. Why not just replace that whole ceiling with a clear PVC sheet, if all you care about is light?
0
Reply
Female 2,120
Yes, I`ve heard about this. It`s apparently just a mixture of filtered water and bleach, and it provides a crapton of light.
0
Reply
Male 5,094
It does, but daytime only.
0
Reply
Male 1,083
If you like that you`ll love this

Latest model of the HSL 3000, mounted on a flat roof. Dish is 4 feet in diameter, and lights 1000 square feet inside the building, minus the UV rays. Expected lifetime: 20 years.
Link
0
Reply
Male 19,862
Link: Overhead Indoor Water Bottle Lighting [3 Pics] [Rate Link] - Always amazed at this `invention`--does it really work this well? It`s like a 100 watt bulb.
0
Reply