(The Register) The British-designed Deciwatt gravity-powered lamp is now in production and shipping, a year after the project went public.
It was conceived by Martin Riddiford and Jim Reeves of industrial design outfit Therefore, which is best known for clever mechanical designs including the Psion computer keyboard. Therefore invited The Register to see the contraption at work this week.
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The GravityLight is intended to provide a less damaging and dangerous* alternative to burning kerosene or biomass in the world's poorest countries - but it has also captured the imagination of Western hobbyists.