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Difference between revisions of "Terminology"
current regulation more efficient than PWM
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;Cree: a manufacturer of high-power, high-efficiency LEDs; particularly the XR-E, XP-E, XP-G, and MC-E. See article [[Cree]]. | ;Cree: a manufacturer of high-power, high-efficiency LEDs; particularly the XR-E, XP-E, XP-G, and MC-E. See article [[Cree]]. | ||
;crenelated: scalloped front of a light, to 1) help prevent accidentally leaving the light on when stood on its head; 2) increase utility as a weapon, especially on larger lights (tail is sometimes crenelated too). Sometimes spelled "crenulated." | ;crenelated: scalloped bezel at the front of a light, to 1) help prevent accidentally leaving the light on when stood on its head; 2) increase utility as a weapon, especially on larger lights (tail is sometimes crenelated too). Sometimes spelled "crenulated." | ||
;CRI: Color Rendering Index - a value indicating how well a light source will show colors, with 100 being a perfect representation. | ;CRI: Color Rendering Index - a value indicating how well a light source will show colors, with 100 being a perfect representation. | ||
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;protected: Preventing damaging [[Rechargeable#Lithium_Ion_.28Li-ion.29_-_3.7V.2Fcell|Li-Ion]] cells by excessive discharge or current, either by a protection circuit built into the battery, or (in some flashlights) by the light turning off or going to a lower level. | ;protected: Preventing damaging [[Rechargeable#Lithium_Ion_.28Li-ion.29_-_3.7V.2Fcell|Li-Ion]] cells by excessive discharge or current, either by a protection circuit built into the battery, or (in some flashlights) by the light turning off or going to a lower level. | ||
;<span id="PWM">PWM</span>: Pulse Width Modulation. A technique of varying the brightness of a LED by flashing it on and off very quickly, making it appear to the eye that the LED is dimmer. Good PWM is at such a high rate that you can't notice it. But if you wave your hand in front of the light and get a strobe effect, the PWM is getting too low. Some use current regulation which makes the light dimmer without PWM. | ;<span id="PWM">PWM</span>: Pulse Width Modulation. A technique of varying the brightness of a LED by flashing it on and off very quickly, making it appear to the eye that the LED is dimmer. Good PWM is at such a high rate that you can't notice it. But if you wave your hand in front of the light and get a strobe effect, the PWM is getting too low. Some use current regulation which makes the light dimmer without PWM and is also more efficient. | ||
;<span id="ramping">ramping</span>: a mode in some flashlights where the brightness varies (ramps up or ramps down) and you select the brightness level you want. Sometimes this level is then memorized, but in the original Nitecore D10 it is only used until you turn the light off again. | ;<span id="ramping">ramping</span>: a mode in some flashlights where the brightness varies (ramps up or ramps down) and you select the brightness level you want. Sometimes this level is then memorized, but in the original Nitecore D10 it is only used until you turn the light off again. | ||