GravityLight
Sign in to savethumb GravityLight was a gravity-powered lamp manufactured until 2019. It was 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 was claimed to power the light for up to twenty minutes. The design never proceeded beyond a limited number of early prototypes which did not appear to be practically usable by many consumers, and the company announced a change of direction in 2020.
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7 sectionsContents
- Theory of operation
- Prototypes
- History
- Media coverage
- Further reading
- References
- External links
thumb GravityLight was a gravity-powered lamp manufactured until 2019. It was 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 was claimed to power the light for up to twenty minutes. The design never proceeded beyond a limited number of early prototypes which did not appear to be practically usable by many consumers, and the company announced a change of direction in 2020.
== Theory of operation == The GravityLight converts potential energy that is stored in a weight into light. The principles involved in this design are very similar to the principles in a cuckoo clock or grandfather clock powered by a weight, but with the potential energy of the weight being converted to visible energy rather than kinetic energy.