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
Rechargeable Wind-Up Torch With 5 Super Bright LEDs
8.49
Handheld torch with built-in dynamo mechanism and rechargeable batteries. It is lightweight and comes with three illumination modes (one, three, and five LEDs) as well as an output socket (cable included).
Five super bright LEDs "Button-operated illumination modes (select one LED, three LEDs, five LEDs to control battery life)" In-built rechargeable batteries Dynamo charges batteries Pull out the handle and turn to charge (two rotations per second) One minute charge yields up to 15m of light Boxed with instructions Cable to charge other devices (instructions not provided) No-hassle lighting saves a fortune in batteries Lightweight and ergonomic LED Charging Indicator Dimensions: 136mm x 55mm x 45mm Due to the brightness of the LEDs this torch is not suitable for young children.
TREBOONA.com
Five super bright LEDs
