Light Emitting Diodes are becoming more common in use for torches, commercial and domesting lighting, and specialist applications. LEDs come in many types. Significantly for torches, some LEDs emit much more light than others, look for ratings such as 1W,

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Image of SW: Keyring Yoda Lightsaber LED Torch. SW: Keyring Yoda Lightsaber LED Torch
$9.95 ISBN 5024095213997
Looks like Yoda's lightsaber (handle only) but is a little torch for your keys. Green LED. 3 x LR...