GravityLight

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GravityLight is a gravity-powered lamp designed by the company Deciwatt for use in developing or third-world nations, as a replacement for kerosene lamps. It uses a bag filled with rocks or earth, attached to a cord, which slowly descends similar to the weight drive in a cuckoo clock. This action powers the light for up to thirty minutes.[1][2][3][4][5][6][7]

Further reading

References

Wikimedia Commons has media related to GravityLight.
  1. ↑ Joann Pan (2012-11-28). "This $5 Lamp Is Powered Solely by Gravity". Mashable.com. Retrieved 2012-12-22. 
  2. ↑ "Help make it happen for GravityLight, lighting for the developing countries". Deciwatt.org. Retrieved 2012-12-22. 
  3. ↑ "GravityLight: gravity lighting without battery". Ghacks.net. Retrieved 2012-12-22. 
  4. ↑ Divulgação. "Nova lâmpada é movida a gravidade - EXAME.com". Exame.abril.com.br. Retrieved 2012-12-22. 
  5. ↑ "Soon, lamps powered by gravity - The Times of India". The Times of India. Retrieved 2012-12-22. 
  6. ↑ "Schwerkraft-Lampe Gravity Light, Android-Konsole Esfere - SPIEGEL ONLINE". Spiegel.de. 2012-12-13. Retrieved 2012-12-22. 
  7. ↑ Warr, Philippa (2012-12-18). "Innovative £3 light powered by sand and gravity". Wired.co.uk. Retrieved 2013-01-02. 
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