A typical household incandescent light bulb uses electrical energy at a rate of 40 to 100 watts, while the energy-saving compact fluorescent lights which are replacing them use 8 to 20 watts to yield the same light output.
Solar, Windup, Dynamo, and Faraday Powered LED Torches and Gadgets
Hand-held torch with 128 LEDs combine to generate an impressive light source. The sturdy casing is finished in olive with a knurled grip and houses an two easy-load battery caddies.
128 Super Bright LEDs "Reliable, efficient, with a powerful directed beam" Soft-touch on-off button Cool to touch Olive Alluminium Alloy Housing Takes six x AA batteries (not supplied) Knurled grip Easy-load battery caddy system Dimensions: 240mm x 90mm (head) x 40mm (barrel) Due to the brightness of the LEDs this torch is not suitable for young children.