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Solar Cell Efficiency

Only 1% of the light landing on the first solar cell was turned into electricity. The first commercial solar panels in the 1950s improved this to 6%, but continued development has pushed the efficiency of modern devices to nearly 20%. Researchers are now working with novel materials having efficiencies above 25%.

Solar, Windup, Dynamo, and Faraday Powered LED Torches and Gadgets

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Rugged 100 LED Aluminium Alloy Torch / Flashlight

14.99

Hand-held torch with 100 LEDs combine to generate an impressive light source. The sturdy casing is fronted by recessed LED panel for protection with carry handle and rubberised grip.

100 Super Bright LEDs
"Reliable, efficient, with a powerful directed beam"
Soft-touch on-off button
Cool to touch
Recessed front panel to protect LEDs
Takes four x AA batteries (not supplied)
Rubberised grip
Battery caddy system
Dimensions: 170mm x 75mm (head) x 40mm (barrel)
Due to the brightness of the LEDs this torch is not suitable for young children.
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