Last year's winner of the Ashden 2010 Gold Award, d.light design, has one of its solar lanterns on display at the British Museum as the 100th Object in The History of the World in a 100 Objects.

Today d.light launches its latest low-cost solar lantern, the d.light S1, which it describes as a "solar study lamp for young people withe big dreams".

The d.light S1 provides four hours of bright light from one full day of solar energy and has an adjustable handle that allows the product to turn easily in the direction of the sun.

Sam Goldman, d.light's Chief Customer Officer, says the product "addresses a  top priority for our customer: their children's education".