Как отличить оригинальный от подделки

На сверхярких светодиодах в основном собирают дорогие многофункциональные фонари, например Ultrafire. У некоторых фонарей, например на Aliexpress, китайцы указывают такую высокую яркость, как будто используют инопланетные технологии. Чтобы установить истинную яркость, необходимо по марке светодиода узнать его номинальный световой поток. Кроме фонарей на оригинальных, китайцы продают большое количество фонариков на поддельных элементах. Поддельный по внешнему виду может напоминать оригинальный, но точного сходства нет. Соответственно, его качество ниже, и срок службы будет гораздо меньше, потому что они могут преждевременно выходить из строя из-за невысокого качества.

Один из самых простых способов определить, что китаец обманывает, это посмотреть спецификации (datasheet) на оригинальный и сравнить размеры. Как правило, поддельный  больше по размерам, чтобы обеспечивать необходимый световой поток. По сравнению с оригиналом у него меньше количество Люмен на Ватт. Купив такой фонарь, не стоит расстраиваться, вы просто получили товар, который соответствует потраченной сумме.

Подробные характеристики U2 и U3

Основные характеристики

Таблица параметров Крии XML

Спектр излучения

Яркость в зависимости от температуры

Зависимость силы тока от напряжения

График зависимости яркости от силы тока

Направленность светового потока

Итоги

Независимо от поколения, данный светодиод обеспечивает очень хороший световой поток. Если продавец просит немалую доплату за второе поколение, то смело можете его отфутболить, он пытается вас развести на денежку, так как цена у них одинаковая, а разнице есть только на бумаге.

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Characteristics of LED CREE XM-L2 U2 and U3

CREE company is one of the market leaders in the production of LEDs. One of the most popular have become powerful diodes Xlamp series. On the basis of CREE XM-L2 produced lights for bicycles, compact powerful lights.

Clever Chinese sellers especially like to put on their products labeled CREE, the presence of such inscriptions repeatedly raises the level of sales. After all, most buyers will not be able to distinguish real from fake Cree even simply can not compare the light output, the light bright — that’s good. But if there were no signs of Cree, the more likely that you would have bought something else that will justify their confidence.

Basic parameters CREE XM-L2 U2 and U3

For those who are not particularly versed technical documentation, to draw up a table of main parameters. Just do not confuse the series of Cree XM-L and XM-L2, they differ in color. In XML it is green, XML2 are silver. Even you can slip very popular bin LED CREE the XM-T6 of L , it has a little bit worse characteristics, but visually you will not notice the difference.

Parameter	U2	U3
Luminous flux Lumen	300-320	320-340
Power	2 W	2 W
Operating temperature, degrees	-40 To +85	-40 To +85
Rated current, mA	700	700
The supply voltage at a current of 700 mA	2.85 volts	2.85 volts
The supply voltage at a current of 1500 mA	3.05 volts	3.05 volts
The supply voltage at a current of 3000 mA	3.3 Volt	3.3 Volt
The length and width in mm	5 x 5	5 x 5
Viewing angle, degrees	125	125
Colour Rendering Index	from 70 to 90 Ra	from 70 to 90 Ra

How to distinguish the original from the fake

In the high-brightness light-emitting diodes are mainly collected expensive multifunctional lights, for example Ultrafire. Some lamps, such as on Aliexpress, Chinese people show a high brightness as if using alien technology. To establish the true brightness, it is necessary for him to know the brand of the LED luminous flux. In addition to the original lamps, Chinese lanterns sell a large number of counterfeit items on. Fake appearance may resemble the original, but there is no exact similarities. Accordingly, the quality is lower and the service life will be much less, because they can fail prematurely due to poor quality.

One of the easiest ways to determine what the Chinese cheating, is to see the specifications (datasheet) on the original and compare sizes. Usually, fake larger in size to provide the required light output. Compared with the original it has less number of lumens per watt. Having bought a flashlight, do not worry, you just received the goods, which corresponds to the amount spent.

Detailed specifications U2 and U3

Results

Regardless of the generation, the LED provides a very good light output.If the seller requests a considerable surcharge for the second generation, it can safely got rid of his, he is trying to dissolve your money, since they have the same price, and the difference is only on paper.

 

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Characteristics of CREE XM-L T6 LED

One of the leaders of the global LED market is the company CREE. Its LEDs many times more popular as compared to other products. Who is not good at foreign languages, nothing will be able to find it, but the structure of the official site quite confusing.

A Poland Internet stores information about the specifications practically does not occur, and that to find the characteristics of CREE LEDs have to try not weak. To find the specifications CREE XM-L T6, sometimes referred to simply as XML T6, had to be revised several rather large document with datasheet parameters.

Such situations are a variety of shops, including the Chinese. Referring to the eminent manufacturer, they promise a huge amount of lumens luminous flux and the same unreasonably lift up the price of these bulbs.

In the best case, you will sell the original Cree bulb at an inflated price.In the worst case, due to the influx of low-quality diode lamps from China, you would sell the lamp to poor quality of unknown origin at the price of the original CREE T6. To distinguish similar to the original, you have to look for technical specifications to find out all by yourself or consult an independent expert. In this online store will receive super-profits, as the price of a copy of the original may not be 5-10 times.

Specifications CREE XM-L T6

Parameter	Cree XM-L T6
Nominal luminous flux Lumen	280
Power	2W
Operating temperature, degrees	+150
Rated current, mA	700
The supply voltage at a current of 700 mA	2.9 volts
The length and width in mm	5 x 5
Viewing angle, degrees	125
Colour Rendering Index	from 80 to 90 Ra

Cree options have always been the best characteristics: super-bright, long-lasting and expensive. Consider options T6 LED neutral white light, which has the average characteristics between warm and cold. It belongs to a series of chapel CREE Xlamp.

In rooms with white lamp cold light surfaces gives the effect of ultraviolet radiation. This effect I have obtained by installing a light bulb in a large hall at the site, why all delighted with such light, such as a disco.

Other modes are shown in the table only for reference, such as 1000, 1500, 2000 milliamperes. That is, they are calculated theoretically, but in practice they are not applied, and performance in these modes can not be guaranteed.

Also, in any case, pay attention to the lamp heat, higher power, the better it should be cooler. Otherwise it easily melts or burns.

Detailed specifications

Results

XML T6 turned out really good in the parameters. High output of 120 lumens per watt will not be worth the money spent. Simply buy a conventional lamp with a return of 100 lumens per watt, but the light bulb will be on 1 or 2 diode longer, but it will cost 5 times cheaper.

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