Instructables

How to build a SOLAR BOTTLE BULB

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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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Dark Bottle1 month ago

really cool

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

jopeyemi3 months ago
Great how/where can l get bleach. My email jopeyemi60@yahoo.com or stanleyboy39@yahoo.com pls help me
rrese4 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?

SkyKing1010106 months ago

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

squishyjoss9 months ago
Awe-inspiring...!!
jimbuntu9 months 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
schurr jimbuntu9 months ago
Also in Brasil
ksail10 months ago
Nice work
-t1 year 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 -t10 months 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 Chance11 months 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.
diy_bloke J Chance10 months ago
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
verity3311 months ago
You may all be interested to know the story of how these bottle lights started:

http://www.bbc.co.uk/news/magazine-23536914

It's a great story! :o)
Varenberg1 year ago
This may seem like an odd question, but what if you use a bigger bottle, like the 5 liter ones? Would the light distribution become more like a 100 Watts light bulb?
Think of it more like a skylight than a "bulb", A bigger opening would introduce more light, but it would need some sort of additional strapping to support the weight
nmoraga1 year ago
just a question , what if i pour half of bottle with bleach and the other half is water, will it be more brighter?
LNaboo nmoraga1 year ago
no, the bleach is just to keep the water from stagnating
Good Question...
donkeyknee1 year ago
Thats good
sensational and informative! thanks
WOW!
Thank you so much :) You made my day !!
yes!
acachucho1 year ago
Could someone please email pdf instructions as I am not a Pro memeber
kdiane1 year ago
sensational and informative
thanks
aewers1 year ago
It isn't anything special just the light being scattered. Kinda like when water drips from a sink and you see little dots of white light flit about the ripples. There is no chemical reaction or luminescence. It only provides light during daylight hours. Hopefully that helps
JensonBut1 year ago
WOW!
Thank you so much :) You made my day !!

MartijnD1 year ago
I would add some salt and alcohol too, if it freezes the bottle will suffer less forces because the water will not freeze so the water will not turn to ice; ice has a lower density than water so the volume will go up, stress on bottle where the bottle is in contact with the roof-panels.

Adding fluorescent components wiil make it glow a little, not enough to see what you would be doing but maybe nice as an orientation light.

These kind of bottle lights can also be placed in a wall, I saw it in one of the Transformer movies near the Pyramids where megan and shia hide and are found by a bug-transformer, these look more like glass wine bottles glued in a cement wall, looks pretty cool too!
MartijnD1 year ago
I would add some salt and alcohol too, if it freezes the bottle will suffer less forces because the water will not freeze which results in ice; ice has a lower density than water so the volume will go up, stress on bottle where the bottle is inside the roof-panels. Adding fluorescent components wiil make it glow a little, not enough to see what you would be doing but maybe nice as an orientation light. These kind of bottle lights can also be placed in a wall, I saw it in one of the Transformer movies near the Pyramids where megan and shia hide and are found by a bug-transformer, these look more like glass wine bottles glued in a cement wall, looks pretty cool too!
jniedo1 year ago
Cosmic Electricity
ggarriga1 year ago
There are several comments on the use of Glass Vs PET bottles. As I see it your only issue would be with weight of the container and the strength of the adhesive used to fix the bottle to the roof/ceiling; Maybe using smaller PET bottles 1.5 liter/600ml in larger quantities a beter distribution of light can be achieved.
msluka1 year ago
..tolle Geschichte!
fretted1 year ago
Hmm the Bleach keeps the water from stagnet nasty's and the water refracts the light from above to below into the darkness very clever nice Ible
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