GravityLight: gravity lighting without battery - gHacks Tech News

GravityLight: gravity lighting without battery

After reading the MeterPlug pitch on Indiegogo I decided to browser the site to see if other projects currently running on the site would catch my attention. GravityLight immediately caught my attention for a number of reasons. First, it is a charity project which means that funding the project may not only get you one of the lights, but also people in the developing world. Second, the technology behind GravityLight is interesting. It is a device that produces a light source, or power, using gravity and nothing but. It comes without battery, solar panels or any other form of energy producing or storing capabilities. Since it does not require a battery, it is not only environmentally friendly, but also less prone to require regular replacements as batteries deteriorate over time.

Solar may look like a great idea especially for places like Africa but the problem with solar is that you need a way to store power to have access to it at times when the sun is not available, and that usually means some form of battery again.

GravityLight is a low cost lighting solution, the developers state that it costs about $10 to produce a single unit right now and that they hope to drop the costs with the help of the funding to $5 for a single unit.

So how does it work? The device consists of a body that includes the lamp and the power generation unit, and a weight that is used to produce the power. From what I can tell, you need to fill the weight with sand or rocks and lift it up for a couple of seconds. Power gets generated automatically from then on until the weight reaches the initial position again which seems to be good for 30 minutes of lighting. You can then lift the weight up again to produce additional power and lighting.

gravity light

gravity light 2

The idea behind GravityLight was to manufacturer a light to act as a replacement for Kerosene lamps used in many parts of the developing world. Not only is Kerosene in the long run more expensive, it is also causing health issues and producing Carbon Dioxide.

Some funding options:

  • $25 sponsor a light that will be given to a villager in the developing world.
  • $60 sponsor a light and get a light by yourself
  • $100 sponsor 3 lights and get one by yourself
  • $500 get a light and sponsor future development

GravityLight demonstration video

The project has already reached the goal of 55,000 and is on its way to make it past the $200,000 mark in the next couple of days. Estimated delivery for the lights is March 2013.

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    1. Grr said on December 17, 2012 at 7:04 pm

      this looks to me a great product, and charity.

    2. Anonymous said on December 17, 2012 at 7:26 pm

      it works this same way as dynamo but uses gravity instead of human’s muscles,right?

      1. Martin Brinkmann said on December 17, 2012 at 7:34 pm

        Seems like it. I think it is impressive that you can get 30 minutes of light out of this.

        1. imu said on December 17, 2012 at 7:45 pm

          my guess is that it depends how long is the string with the ballast on it, so as soon as the ballast hits the floor your light is off.

    3. imu said on December 17, 2012 at 7:54 pm

      put the bag with the sand into a deep well and you have light all night long.

      1. Martin Brinkmann said on December 17, 2012 at 8:03 pm

        Would be interesting if you could really extend it that way if you make it long enough.

    4. JohnJ said on December 18, 2012 at 2:21 am

      Wonderful. And with a slight re-design, the unit can hang outside with longer strings and wired to a light in the house.

    5. dev said on December 18, 2012 at 10:42 am

      Great!!! Sometimes a simple technology may come in the future to solve the energy issues…

    6. DD said on December 18, 2012 at 12:31 pm

      Thanks for the article, I enjoyed reading it. Just thought I’d mention that having the embedded video auto play while I’m viewing the feed in Google reader kind of creeped me out. I thought my computer was talking to me.

      1. Martin Brinkmann said on December 18, 2012 at 12:55 pm

        Sorry for that, disabled the autoplay.

    7. raymond nevin said on December 18, 2012 at 11:51 pm

      wonderful design why not use a weight powered pendelum clock to power the light would last a lot longer eg 24 hrs.

    8. Dennis said on January 28, 2013 at 4:24 am

      Do I see above that if I sponsor 1 light for $60, I get one for me also?
      We are often without power or light during storms.
      Regards and what a great idea.

      1. Martin Brinkmann said on January 28, 2013 at 10:03 am

        Yes that is right Dennis.

    9. sunil M R said on February 8, 2013 at 9:30 am

      sir we agree with u to do this project … plz send material regarding this project

    10. Altamush said on February 15, 2013 at 12:09 am

      I want purchase this light. plz tell me the process.

    11. Dennis said on February 15, 2013 at 11:37 am

      How do I purchase one of these gravity lights, please?

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