Instructables
Light up dark areas in your home during daytime using this green and sustainable concept. Recycle used clear plastic soda bottles, add water+bleach, then install. After installation this solar light bulb can provide approximately 55 watts of light from the sun! 

The comments below have noted that this is like a solar tube or deck prism. 

The communities who benefit from this idea live in areas where the houses hardly have windows and live in darkness even during daytime. Their solution up until this innovation was to turn on the light bulb and use electricity.



Source: www.isanglitrongliwanag.org

Materials:
*PET soda bottle
*Galvanized Iron (GI) sheet
*Rubber sealant
*Bleach
*Filtered Water
 
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Step 1: Cut approximately 9 x 10 inches of GI sheet (corrugated or flat)

Picture of Cut approximately 9 x 10 inches of GI sheet (corrugated or flat)
(Filipino: Gumupit ng yero na may sukat na 9 x 10 inches.)


*Here is a how-to video

Step 3: Cut the 1 cm difference radially, making strips and bend upwards, perpendicular to the GI sheet

Picture of Cut the 1 cm difference radially, making strips and bend upwards, perpendicular to the GI sheet
(Filipino: Gupitin paikot ang natira na 1 cm sa maliliit na bahagi at itupi pataas, salungat sa yero.)

Step 4: Using sandpaper, scratch the surface around the upper third portion of the soda bottle where the GI sheet will be placed, to allow the rubber sealant to stick better

Picture of Using sandpaper, scratch the surface around the upper third portion of the soda bottle where the GI sheet will be placed, to allow the rubber sealant to stick better
(Filipino: Gamit ang sandpaper, kuskusin ang ibabaw sa may ikatlong bahagi ng bote kung saan ilalagay ang GI sheet para mas dumikit ang rubber sealant.)

Step 5: Insert the bottle into the GI sheet until the upper third. Apply rubber sealant on the strips above and around the area below. Wait to dry

Picture of Insert the bottle into the GI sheet until the upper third. Apply rubber sealant on the strips above and around the area below. Wait to dry
Picture10.jpg
Picture11.jpg
(Filipino: Ipasok ang bote sa gitnang butas ng yero hanggang sa itaas na ikatlong bahagi. Lagyan ng rubber sealant ang itaas at ibaba ng pinagkabitan.)

Step 6: Fill the soda bottle with filtered water and ~10 mL (2 capfuls) of bleach. Cover with its original cap

Picture of Fill the soda bottle with filtered water and ~10 mL (2 capfuls) of bleach. Cover with its original cap
Picture13.jpg
(Filipino: Punuin ang bote ng filtered na tubig at ~10 mL na bleach (2 sukat gamit ang takip). Ilagay ang takip.)


Step 7: The solar bottle bulb is now ready for installation!

Picture of The solar bottle bulb is now ready for installation!
Picture15.jpg
(Filipino: Ang solar bottle bulb ay handa nang ikabit!)

(Proceed to next step for the installation.)

Step 8: Cut a hole on the roof, similar to the bottle circumference

Picture of Cut a hole on the roof, similar to the bottle circumference
(Filipino: Gumawa ng butas sa bubong, pareho sa sukat ng bote.)

Step 9: -Place the solar bottle bulb into the hole. Make sure it is firmly in place

Picture of -Place the solar bottle bulb into the hole. Make sure it is firmly in place
InstallationStep3.jpg
(Filipino: Ilagay ang solar bottle bulb sa butas. Siguraduhin na maayos ang pagkalagay.)

Step 10: Drill 4 holes on each side of the solar bottle bulb using Bosch lithium-ion cordless drill and put in the rivets

Picture of Drill 4 holes on each side of the solar bottle bulb using Bosch lithium-ion cordless drill and put in the rivets
(Filipino: Magbutas ng apat sa magkabilang gilid ng solar bottle bulb gamit ang Bosch lithium-ion cordless drill at lagyan ng rivets.)

Step 11: Apply rubber sealant around all edges of the GI sheet of the solar bottle bulb to avoid leakage. Make sure to cover the rivets

Picture of Apply rubber sealant around all edges of the GI sheet of the solar bottle bulb to avoid leakage. Make sure to cover the rivets
(Filipino: Maglagay ng rubber sealant sa lahat na gilid ng GI sheet ng solar bottle bulb upang maiwasan ang pagtulo.)

Step 12: Place a protective plastic tube on the bottle cap and apply rubber sealant

(Filipino: Lagyan ng plastic tube at rubber sealant ang takip ng bote.)
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will it work at night

will it work at night

paparod485 days ago
I did what your instrutions are . But doesnr work

Where can i find a plastic tube? Ive been looking everywhere for something similar to old film containers but havent found anything similar. Any advice?

Buy Coke or Sprite 1.5L.

Buy Coke or Sprite 1.5L.

Buy Coke or Sprite 1.5L.

Are you going to be traveling to Taos soon? I am not sure if I am asking the right person :-)

I don't think you need anyone to travel to Taos. You can simply make it yourself with an empty clear plastic bottle or container.

RE: Choclinda

Lol!! I obviously should have been more specific.

The man who invented this special light technology was to attend a conference here in Taos and I was wondering if the author was the same person. I agree that anyone could make this with this Instructable or a tutorial.

And yes, the man responsible for this technology did in fact speak at the conference and I was lucky enough to see him.

Sorry for any confusion. Which is why I originally had asked if this was in fact the same person.

:-)

rrese8 months ago

whether it will still be lit if I put it in the garden? with poles for example, as a replacement for garden lights?

Choclinda rrese2 months ago

It won't work in the dark.

mahesh burse2 months ago

will it work at night???????? Upto how much time a bottle will go????? any thoughts.......

it does not work at night. (unless you got streetlights outside though the resulting lumination would be really dim compared to that of at day) and it only refracts sun light.

I doubt very much that street lights would produce enough light to penetrate the bottle.

Obviously it doesn't work without natural light. It's the light outside that shines through the water in the bottle that creates the light. The bottle will work endlessly unless it's broken.

This is being done in South Africa where it is very successful as there is abundant sunshine.

if it has solar panel and battery, it can be used at night, and even can charger small device like phone ,mp3 etc
optional: remote control, usb port ,
let bring light to life .

lovotor03@lovotor.com

solar powered flashing light.jpg细节.jpgsolar led light.jpg

is it ok not to put it in a bottle?

with no bottle, you just have a hole in the roof, so do NOT skip that step.

what tool did you use to cut the circle on the galvanized iron sheet? (i need to describe it in my research paper) thank you!

Step 2

Clearly shows the hole being cut using tin snips.

Looks like a starter hole was made using a cold chisel(which COULD be used to make the whole cut, but would take a bit longer, and not be as "clean"

Dark Bottle5 months ago

really cool

jopeyemi7 months ago
Great how/where can l get bleach. My email jopeyemi60@yahoo.com or stanleyboy39@yahoo.com pls help me
SkyKing10101010 months ago

Excellent!! Now I know how I'm going to light my shed, and I'll certainly be passing this along.

Awe-inspiring...!!
jimbuntu1 year ago
I heard it use a lot in the Philippine.
I saw this link: http://issuu.com/sustainia/docs/s10-2013/9?e=4517615/4897088
Also in Brasil
ksail1 year ago
Nice work
-t2 years ago
I love this idea but I am curious if it could be made more efficient with the use of a Glass bottle and a more reflective piece of sheet metal (like aluminum?).

Any thoughts?
diy_bloke -t1 year ago
It all depends where you want to put the aluminum reflector.
For the amount of light PET or glass does not make much difference. There arent much places where you could put any aluminum. Around the bottle? can but you'd end up with a spot light and not with a light radiating to all sides.

There are commercial light tubes available (at a steep price I may add) that is basically an alu or stainless steel tube that reflects the light at the inside, making it possible to go around an angle a bit
Is there something special about PET bottles? Would normal un-PET bottles work too?
the special thing about them is that they are abundant
Any bottle that is made from UV resistent material would be ok
BlueKnyght1 year ago
can't we use glass bottles instead of pet bottles??? i think glass will last longer than plastic... or probably forever if left undisturbed.
The weight would be prohibitive, plus it would be dangerous if it disconnected and shattered
actually, i've done it. I found a very long 1.5 liter glass bottle from a school sci.lab, and when I got back home, I bored a strategic hole just beside a roof beam/frame, and I attached the solar bottle bulb on the 3" x 6" wooden roof frame for strength, using epoxy, steel wires, and plenty of roof sealant... I think it's strong enough to last.... unless maybe some earthquake breaks the frame it is attached to. Sadly it is only brighter when the sun outside is brighter... and I definitely don't advise looking at it directly when it is bright.
Even with plastic bottles I run a support wire, just to make sure :-)
Glass in principle is possible.

Ofcourse one can always buy a commercial solar tube, from aluminium, at 200-250 euro

:-)
J Chance1 year ago
Is the galvanized Iron sheet needed or is that only if you're using it for the roofing?

I'm doing an art piece and I really want the lightbulb affect without the iron-sheet on the bottle.
that is not needed at all. it is just because it is installed on a roof.. Could also make a hole in the roof directly, any roof practically, as long as you make sure it is sealed
good one
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