TheFiringLine Forums - View Single Post - 30mm scope mount (PISTOL LANYARD) recommendation for AR15
Flashlights
Recently, flashlights which use light-emitting diodes (LEDs) instead of conventional lightbulbs have become available. LEDs have existed for decades, mainly as low-power indicator lights. In 1999, Lumileds Corporation [1] of San Jose, CA introduced the Luxeon LED, a high-power white-light emitter. For the first time this made possible LED flashlights with power and running time better than some incandescent lights. The first Luxeon LED “flashlights” was the Arc LS in 2001.
LEDs can be significantly more efficient at lower power levels, hence use less battery energy than normal lightbulbs. Such flashlights have longer battery lifetimes, in some cases hundreds of hours. At higher power levels, the LED efficiency advantage diminishes. LEDs also survive sharp blows that often break conventional lightbulbs.
LED flashlights are often electronically regulated to maintain constant light output as the batteries fade. By contrast a non-regulated flashlights becomes progressively dimmer, sometimes spending much of the total running time below 50 percent brightness level.
A common misconception about LED-based “flashlights” is that they generate no heat. While lower-power LED flashlights generate little heat, more powerful LED lights do generate significant amounts of heat. For this reason higher-powered LED flashlights usually have metal bodies and can become warm during use.
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TheFiringLine Forums - View Single Post - 30mm scope mount recommendation for AR15
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