Down LighterMonday 29th July 2013
We have continually posted about some great innovative ideas to provide light to those who do not have ready access to power, in crisis situations and disaster zones - check out our last post on the LuminAID Lantern.
These all generally use solar, wind or even human energy (hand cranking) to charge and provide illumination - but there is always a question: “What if there is little sunlight, no wind or you're just too tired, or unable, to turn that handle anymore?”
The answer would appear to be GravityLight from Deciwatt - who looked for $55,000 from crowd funding and closed out with $399,590!
GravityLight is an LED light that powers for up to 30 minutes all from gravity, which fortunately is always available and if it becomes scarce we don’t think you'll be worried about the lights. All you have to do to get illumination is pull on the light’s weight cord and gravity will provide the energy for the light.
How does it work?
A cord runs through the compact unit, that could be hung from a beam, a tree or some other secure point. On one end of this cord is a counter weight - which cleverly is the fabric bag that the device is delivered in, which can be filled with earth, sand or stones.
By pulling the cord and lifting the bag, gravity takes over as the weight slowly pulls the cord down, through the GravityLight’s mechanism which converts the cords travel into energy to power the light.
There is a continuous cord, to lift the weight (provided by a bag) on the other end. As the bag slowly descends, gears convert the weight into energy — providing up to 30 minutes of light, depending on the weight of the bag. There are also settings to provide brighter light for a shorter period.
GravityLight can also power other lights or recharge devices through a basic connection - a lot of thought and attention to detail has gone into the design and production of GravityLight and once again with a higher aim - to help those in the developing world who have little access to safe lighting. As always though - this is a useful edition to any emergency kit, camping or outback equipment.
Monday 29th July 2013