Modern Lamps with LED Flashlights
March 18, 2009
I bought my first LED flashlight about nine years ago. It was a small keychain using a button-cell battery. Since that time, LED flashlights have advanced a lot and new models have shinier lights using more LEDs.
Light-emitting diodes or LEDs are solid-state transistors which give off light when a current passes through them. [...]
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