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誤區一，對實踐運用壽數的希望過高
A misunderstanding, the practice of using his hopes too high.
LED制造商預期LED壽數到達100,000小時 MTBF (均勻無故障時刻，傳統燈具制造商運用的丈量光源壽數的規范)。可是，就像所有根本光源相同，LED的光通量流明也跟著時刻而衰減。所以，盡管LED發光時刻能夠很長，MTBF不是確定運用壽數的僅有思考。LED流明的衰減受到許多環境條件如環境溫度、濕度和通風的影響。流明衰減還受到操控、熱學管理、電流水平緩許多其它電氣設計思考的影響。
LED LED is expected to reach 100000 hours old manufacturer MTBF (standard uniform no fault time, measuring light source lamp manufacturers use the traditional life). However, as with all the fundamental light sources, the LED luminous flux is also attenuated with time. So, although LED led to a long time, MTBF is not only determined by using the thinking of life. LED lumen attenuation is affected by many environmental conditions such as ambient temperature, humidity and ventilation. Lumen attenuation is also affected by many other electrical design considerations such as manipulation, thermal management, and current levels.
許多業務員在推銷LED時出于某種原因可能給客戶供給一些含糊信息，形成誤導，例如LED的運用壽數在10萬小時左右，這兒的10萬小時是指制造商預期 LED的運用壽數。但作為照明的光源，燈的亮度有一個逐步衰減變暗的進程(如日光燈，節能燈)，這一進程簡稱光衰。所以，消費者在選購LED時要重視的是它的光衰速度，而不是運用時刻，消費者切莫對實踐運用壽數的希望過高。
Many sales clerk in the LED for some reason may give customers some vague information, such as the formation of misleading, the use of LED days in 100 thousand hours, 100 thousand hours here refers to the use of LED manufacturers expected life. But as the lighting of the light source, the brightness of the lamp has a gradual decay of dark process (such as fluorescent lamps, energy-saving lamps, this process is referred to as light). Therefore, consumers should pay attention to in the purchase of LED when it is light speed, instead of using time, consumers not to practice his hopes too high.
誤區二，把實踐發光視點當成有用視點
Error two, the practice of luminous point of view as a useful point of view
LED的發光視點分為有用視點和實踐發光視點。發光強度值為軸向強度值一半的方向與發光軸向(法向)的夾角為有用視點。半值角的2倍為視角(或稱半功率角)是實踐發光視點。在軸向強度一半以外的視點因為光線太弱在實踐使用中不計入有用視點。
LED luminous point of view is divided into useful point of view and practical lighting. The angle between the direction of the luminous intensity value of the axial intensity value and the direction of the luminous axial (normal) is useful. Half of the value of 2 times as the angle of view (or half power angle) is the practice of luminous point of view. In the view of half of the axial intensity, the light is too weak to be used in practical use.
因此，消費者在選購商品時應當重視商品的實踐發光視點，核算工程中所用商品數量時，以實踐發光視點為準，有用發光視點只能夠作為參考值。
Therefore, consumers should pay attention to the purchase of goods in the light of the practical point of view, accounting for the number of goods used in the project, in order to practice the luminous point of view prevail, useful luminous point of view can only be used as a reference value.
誤區三，功率越大亮度越高
Error three, the greater the power, the higher the brightness
LED的亮度用發光強度來衡量，發光強度是指法線(對圓柱形發光管是指其軸線)方向上的發光強度，即單位立體角所發射出的光通量，單位為燭光(Candela, cd)。因為一般LED的發光強度小，所以發光強度常用毫坎德拉(mcd)作單位。一般來說，光源會向不一樣方向以不一樣強度放射出其光通量，在特定方向單位立體角所放出之可見光輻射強度即稱之為光強度，簡稱軸向亮度。
The brightness of the LED used to measure the luminous intensity, luminous intensity is fingering (of cylindrical luminous tube line refers to its axis) direction of the luminous intensity, luminous flux per unit solid angle emitted, the candle unit (Candela, CD). Because of the general LED luminous intensity is small, so the luminous intensity of commonly used Candela (MCD) as a unit. In general, the light source will not be in the same direction as the intensity of the radiation emitted by its luminous flux, in the specific direction of the unit of solid angle emitted by the visible light radiation intensity known as the light intensity, referred to as axial brightness.
從力在持平時刻內做功的多少引進電功率的概念，電流做功快，電功率就大;電流做功慢，電功率就小，或說在持平的時刻內，電流做的功越多，電功率就越大，在LED上，并不是功率越大，商品亮度就越高。以宜美電子的三燈赤色LED為例，軸向亮度為1200mcd時，電流是40ma，功率為0.48W;三燈白色LED在平等亮度下，電流是18ma，功率僅為0.24W;能夠看出二種光在平等亮度下的功率是不一樣的。所以，消費者在選購LED燈具時要重視的是它的軸向亮度，而不是功率。
How to introduce electric power from the concept of force acting in the same time, current work fast, electric power is large; current work is slow, the electrical power is small, or in the same time, more power current, electric power is greater, in the LED, and not the greater the power, the commodity the higher brightness. The three red LED lamp should be beautiful electron as an example, the axial brightness is 1200mcd, the current is 40mA, power is 0.48W; three light white LED in equal brightness, current is 18ma, power is only 0.24W; can be seen two kinds of light in equal brightness under the power is not the same. Therefore, consumers should pay attention to the purchase of LED lamps is its axial brightness, rather than power.

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