Terminology: Difference between revisions
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;<span id="CPF">CPF</span>: [http://candlepowerforums.com/ CandlePower Forums] A large flashlight discussion board and marketplace. | ;<span id="CPF">CPF</span>: [http://candlepowerforums.com/ CandlePower Forums] A large flashlight discussion board and marketplace. | ||
;Cree: a manufacturer of high-power, high-efficiency LEDs; particularly the | ;Cree: a manufacturer of high-power, high-efficiency LEDs; particularly the XP-E2, XP-G2, XM-L2, and XP-L. See article [[Cree]]. | ||
;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." | ;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." | ||
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;efficacy: the amount of light output divided by the power consumption. Usually measured in lumens per watt (a watt being volts times amps). For an LED, this value varies with power consumption, becoming less efficient as power increases. Although efficacy is a measure of how efficient an LED is, true "efficiency" would be a percentage calculated by dividing the light output energy divided by the energy consumed. | ;efficacy: the amount of light output divided by the power consumption. Usually measured in lumens per watt (a watt being volts times amps). For an LED, this value varies with power consumption, becoming less efficient as power increases. Although efficacy is a measure of how efficient an LED is, true "efficiency" would be a percentage calculated by dividing the light output energy divided by the energy consumed. | ||
;electronic switch: instead of running power through the switch, the electronic switch just tells the driver when to let power through. This setup allows for a more versatile interface by allowing double clicks, click and hold, etc. Also an electronic switch can work better in a high power light since the switch controls the driver instead of all of the current having to flow through the switch itself. Electronic switches also require a small amount of current even when turned off so the driver can monitor the switch. This is called parasitic drain and can eventually deplete the battery when not in use. | |||
;<span id="emitter">emitter</span>: the actual light-emitting part of an LED assembly. e.g. a Luxeon star comprises a Luxeon emitter mounted to a star circuit board. Also can be used to describe where lumens are measured, for instance whether lumen output is measured at the emitter or OTF (out the front). See article [[Light Output Measurements]]. | ;<span id="emitter">emitter</span>: the actual light-emitting part of an LED assembly. e.g. a Luxeon star comprises a Luxeon emitter mounted to a star circuit board. Also can be used to describe where lumens are measured, for instance whether lumen output is measured at the emitter or OTF (out the front). See article [[Light Output Measurements]]. | ||
<span id="F"></span> | <span id="F"></span> | ||
;<span id="FET">FET</span>: field effect transistor. | ;<span id="FET">FET</span>: field effect transistor. Basically a digitally controlled switch, these are used in high current [[driver|drivers]] offering less resistance to current than other designs and therefore higher output. | ||
;<span id="flood">flood</span>: scattered light emitted from a flashlight. Good for indoor use to light up a room or short-range use outdoors to light up an area. Compare with [[#throw|throw]]. | ;<span id="flood">flood</span>: scattered light emitted from a flashlight. Good for indoor use to light up a room or short-range use outdoors to light up an area. Compare with [[#throw|throw]]. | ||
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<span id="I"></span> | <span id="I"></span> | ||
;IMR: [[Rechargeable#Lithium_Manganese_.28LiMn.29_3.7V.2Fcell|Lithium-Manganese]] | |||
;ICR: [[Rechargeable#Lithium_Ion_.28Li-ion.29_-_3.7V.2Fcell|Lithium-Cobalt]], the most common type of lithium ion rechargeable battery. | |||
;IMR: [[Rechargeable#Lithium_Manganese_.28LiMn.29_3.7V.2Fcell|Lithium-Manganese]], a type of lithium ion rechargeable battery able to sustain high power draws without overheating or exploding like a lithium cobalt battery might. | |||
;incan: [[Incandescent]] | ;incan: [[Incandescent]] | ||
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;memory: 1. The memory effect in some cell types, see article [[Rechargeable]]. | ;memory: 1. The memory effect in some cell types, see article [[Rechargeable]]. | ||
:2. The ability for a flashlight capable of multiple levels of output to remember the last-used level and return to that level the next time it is switched on. | :2. The ability for a flashlight capable of multiple levels of output to remember the last-used level and return to that level the next time it is switched on. | ||
;MOSFET: metal oxide semiconductor field effect transistor, the most common type of FET. See [[#FET|FET]]. | |||
;MCPCB: Metal Core Printed Circuit Board. This is the type of board on which LEDs are usually mounted. They are metal to help transfer heat and are then attached to a pill or heat sink. Sometimes called a "star" or just a "board." | ;MCPCB: Metal Core Printed Circuit Board. This is the type of board on which LEDs are usually mounted. They are metal to help transfer heat and are then attached to a pill or heat sink. Sometimes called a "star" or just a "board." | ||
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<span id="R"></span> | <span id="R"></span> | ||
;R9: When measuring [[#CRI|color rendering index]] of a light source, 8 different colors (R1-R8) are used, but none of those are pure red. R9 is red and therefore is a supplemental measurement to CRI that indicates how well a light source renders red. | |||
;<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. | ||
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;spot: see hotspot | ;spot: see hotspot | ||
;spring bypass: a modification to the battery springs in a flashlight to reduce resistance and increase current. The typical spring bypass involves soldering braided copper wire from the tip of the spring to the base where the spring attaches to the switch and/or driver. | |||
;SSC: Seoul Semiconductor, a Korean LED manufacturer. See article [[Seoul Semiconductor]]. | ;SSC: Seoul Semiconductor, a Korean LED manufacturer. See article [[Seoul Semiconductor]]. | ||