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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

Step 1: 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
<p>I think it is wonderful that people are exercising their initiative in helping themselves. Why would I want to hinder that by contributing? People beg Jesus for miracles; beggars beg for money; neighbors ask questions instead of looking things up. If the boy scout troop wants to go to Hawaii, that's great! Go! Why are they going around asking people to get them there? </p>
<p>What are you talking about?</p>
<p>Although I'm, let's say disappointed with the lack of understanding in the comment about crowd funding, I have always loved this idea. However, It does need some improvement. In Australia the sun will cause the plastic to perish in a single summer. Glass would be a better option, as would a clear liquid that ISN'T prone to grow algae. I have wanted to install some of these in our sheds, but I also have experience with a Solatube, and find that to be a much better option. Now if someone could find a way to use that technology adapting it to re-use of materials, THAT would be brilliant. Crowd funding is not something to blow ones nose at! It has been used by some greedy self important jerks true,as is anything that they can jump on to try to accumulate &quot;points&quot;... but it has also helped others with ideas that DO seek to make products that HELP the poor, the disabled, etc.. People should not be put off the idea of crowd funding simply because of a few with bad intentions. People should be encouraged to think about the need for the product, and do so without greed being the motivation for investing. Invest to make this world a better place for everyone. THAT is the reason for crowd funding my friends.</p>
<p>what is Solatube?</p>
<p>Google it?</p>
<p>Here you will find some information:</p><p>http://lmgtfy.com/?q=Solatube</p>
<p>Just a question: what if I don't have a Bosch lithium-ion cordless drill?</p>
<p>Just a quesstion: Why are you being a jerk?</p>
<p>Although I'm, let's say disappointed with the lack of understanding in the comment about crowd funding, I have always loved this idea. However, It does need some improvement. In Australia the sun will cause the plastic to perish in a single summer. Glass would be a better option, as would a clear liquid that ISN'T prone to grow algae. I have wanted to install some of these in our sheds, but I also have experience with a Solatube, and find that to be a much better option. Now if someone could find a way to use that technology adapting it to re-use of materials, THAT would be brilliant. Crowd funding is not something to blow ones nose at! It has been used by some greedy self important jerks true,as is anything that they can jump on to try to accumulate &quot;points&quot;... but it has also helped others with ideas that DO seek to make products that HELP the poor, the disabled, etc.. People should not be put off the idea of crowd funding simply because of a few with bad intentions. People should be encouraged to think about the need for the product, and do so without greed being the motivation for investing. Invest to make this world a better place for everyone. THAT is the reason for crowd funding my friends.</p>
<p>I'm assuming the bleach is to stop the water going mucky. So you think you could use something else like vinegar? </p><p>I want to install one in my sons cubby house, and I don't trust him not to somehow at some point break it open. Even though it would be a weak solution, I don't want to risk it. </p>
Don't quote me on it because I don't know for sure but I believe it's because the way the bleach mixes with the water is how it reflects so much light but I personally don't know too much about chemistry so you could try it but I don't know
<p>All that the bleach is doing is keeping algae from growing in the solution. Any anti Algal would work, but beware, the lights usually last for 5 years until they degrade. (get foggy, break down or otherwise become unfit to refract light).</p>
<p>Lets see a 8W LED bulb {=60 watt incandescent} has an expected life of 50,000 hours (&gt;15 years) and uses 11 KWh/hr a year WHILE a solar light bulb {=55 watt incandescent} has an expected life of 14,600 hours (~5 years) and uses 0 KWh/hr a year. For the monies saved over the years, it isn't to much of a problem for the user to change the <strong><em>recycled</em></strong> soda bottles every five years! :-)</p>
The LED works at night, too.
Please bear in mind initial purpose and aim of this installation, i.e. it's primarely residencial property that has no windows and no electricity. <br>I think it is very good solution in such given condition and worth to implement in other parts of the world.
<p>Your hours are off.</p><p>A LED is calculated as 3 hours use per day .</p><p>50,000 hours divided by 3 divided by 365 =45 years.</p><p>Apparently the solar light gets way more hours per day especially in the summer.</p><p>We don't think twice to throw a plastic bottle away, but in some countries plastic bottles are recycled which will put food on the table, so a plastic bottle is still a luxury for many of them. Sheet metal is expensive in those countries compare of income and such solar lights require silicone or other substance to seal it which will not last long either.</p><p> Solar lights making their grounds in those countries because the electricity can not be relied on. Power goes out on a constant bases every day and that is the reason those solar lights are getting more popular despite that is hard getting the materials for an individual to make those. </p>
<p>This is obviously for bringing more light into the room during the day. Would even extend the life of any LEDs since they would only be used during overcast and at night.</p>
<p>Chlorine in bleach is to prevent water going green from Algae.</p>
<p>Household bleach is a 3 to 5 % solution of Sodium Hypochlorite (NaOCl). It breaks down in heat and sunlight, turning into Sodium Chloride (table salt) and Oxygen rather quickly. The NaOCl breaks down in water to make a variety of disinfectants (depends on pH), sanitizing the inside of the container and it's contents. If the container stays sealed, there should not be anything left in the water to regrow. 1 mL of 3% NaOCl per liter of pure water is 14.3 ppm. Aim for a 50 ppm dose. After time, you may want to briefly vent the container to release the O2.</p>
That amount of bleach is totally harmless. Bottle bleach is already diluted to around 5% and a cap full diluted in 2 liters of water is really harmless. If you want to spend the money, buy a light tube. They are liquid free and have a lens at the bottom that really brings in a lot more light than the bottle.
<p>A less toxic alternative to bleach is Vital Oxide: http://www.vitaloxide.com</p>
<p>Chlorine in bleach is to prevent water going green from Algae.</p>
<p>This a very thought provoking instructable.... How would glycerin behave, a little oil? So many more avenues for inquiry. Thanks for the challenges. </p>
<p>beutiful project </p><p>I want to help them there if i get the change</p>
<p>Awesome Project....</p>
<p>this plastic bottle light is a remake on a centuries old idea used to illuminate the interiors of darks boats. they are called deck prisms. </p><p>see: <a href="https://en.wikipedia.org/wiki/Deck_prism" rel="nofollow"> https://en.wikipedia.org/wiki/Deck_prism</a></p><p>still its nice idea.</p>
<p>What if you use a glass coca cola bottle, with its curvy form. Will it work the same?</p>
What kind of bleach are gonna put in ? Just like commercial bleach?
<p>cool but this soda solar bottle bulb doesnt work on dark night. Moonlight maybe dont now. </p>
<p>Can not work at night .....no Sun</p>
<p>1 ) Chlorine in bleach is to prevent water going green from Algae.</p><p>2 ) Can not work at night .....no Sun </p>
<p>Great for desert areas... Not direct sunlight, yet you are lighted up with shelter... If you need... Then just grab your AC and just live your life out.</p>
<p>LOL if you had AC, you could just plug in a flourecent light bulb...</p>
<p>Hm... Can you do this without busting your roof open? Maybe... Place them on windows? Except it won't work at noon... Then, another amazing thought... What if people wayyyy back then could do this, and they could have made a clock out of it? like... think... If it went dark in the room, it was noon. If it was bright on one window, it was morning, on the other, evening... Then when it was dark altogether, then it was night.</p>
<p>Amazing idea. Free. Unlinke the Crowdfunding ideas which seek a millions to fund the development of a product the poor cannot afford.</p><p>This won't work under many non-solar conditions but when it does work it must be a miracle for these folks.</p><p>Now if the liquid could be made to store the light similar to fireflies and fish...</p><p>Have you tried using longer tubes, for instance an eight foot tall pipe in the corner of a room? Or a long clear plastic pipe and maybe diffuse its surface? Plastic fiber tubes are used to transfer light from one end to the other.</p>
<p>AMAZING! WHAT A GREAT PERSON THIS IS!!!!!!</p>
<p>My grandfather used this trick to light a work area in his barn when I was a kid. </p>

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Bio: This is the official account of Isang Litrong Liwanag (A Liter of Light). MyShelter Foundation&rsquo;s latest venture is a sustainable lighting project which aims ... More »
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