China’s National Development and Reform Commission announced in 2011 that the policy of banned sales of 100 watts and above of incandescent lamps will be approaching on October 1, 2012. With the phasing out of incandescent products, the relevant LED lighting industry support policies have been further introduced and implemented. LED lighting is about to face a faster development in the critical period of traditional lighting to LED lighting.
In recent years, with the continuous improvement of living standards and increasing attention to topics such as energy and environment, consumers are increasingly demanding energy-saving, environmentally friendly and healthy and comfortable living. In terms of lighting, the choice of greener, energy-saving and healthy lighting products has become the mainstream of society. LED has become an inevitable trend because of its excellent performance in terms of energy saving, environmental protection, efficiency and longevity.
During the period when other incandescent lamps were delisted from other lighting sources, consumers were not absolutely resistant to LED products, but they did not dare to accept it. At present, the product identification on the LED market is unclear and unclear, and there is also a lack of uniform standards. In the face of uneven products, consumers who do not even use common sense of LED technology, when buying led lamps, in addition to higher price factors, usually have a lot of doubts and purchase errors:
Misunderstanding one, a few W LED bulbs can replace a few W incandescent lamps.
Positive solution: Because incandescent lamps usually only talk about wattage and not lumens, it will affect the habit of consumers to buy lamps over time. LED technology is different from incandescent lamps. Since the luminous efficacy of LEDs is still evolving, the wattage does not represent its lumens. Some manufacturers give a label similar to the "40W incandescent replacement product" on the packaging to help consumers buy.
Misunderstanding 2, the greater the LED power, the brighter the brightness.
Positive solution: The brightness and darkness of general LED light is measured by lumens (lm). The higher the lumen (lm) output of LED lamps of different power levels, the more energy-efficient. For example, if the 5W lumen output is 6W higher than the 5W and 6W LED bulbs , then the 5W lamp is actually more energy efficient than the 6W.
Misunderstanding 3. The more lights there are in the LED light, the stronger the brightness and the higher the price.
Positive solution: Due to the different technologies used in LED chips , the luminous efficiency of individual LEDs is also very different. At present, LED chips in the mainstream market have many different forms such as high power, medium power, low power, and COB . For example, a single-lumen output of a medium-power LED is about 45 lm, and a single lumen with a high power can reach 120 lm or more, so it is very likely that the luminous effect of one LED is the same as that of three. In terms of cost, the price of high-power chips is higher than that of medium power. Therefore, the cost performance of LED lamps is mainly determined by the performance of the components selected for them.
How do consumers choose the right LED products for themselves:
1, product packaging two look
(1) Is there a product trademark and certification mark?
For example: 3C certification, CE certification, UL certification, GS certification, etc. In addition, the quality of the trademark printing of high-quality products is good, wiped with a soft damp cloth, the mark is clear, not easy to wipe off.
(2) Is the product's rated voltage, voltage range, color temperature, precautions, safety instructions, applicable environment, etc. clearly marked?
2, product price comparison
Due to special reasons in the production of LED lamps, the cost is relatively high. Generally, the price of domestically produced LED lamps is above 40 yuan, and imports are even higher.
3, the appearance of the product
First look at the appearance of the product is not very rough? Is there any glue that has not been cleaned up, is there a screw that protrudes from the fixed plane? Does the color of the screw match the color of the case?
4, lighting check
The light after lighting needs to carefully observe the color change of the lamp. If it is changed from yellow light to white light in a short time, or white light turns into white light with blue color, such a product should be abandoned because of this There are two possibilities for this situation: one: power problem; two: led light source selection error. In addition, the color of the lamp must be positive, and the color of the lamp is the same, that is, it does not flash. After the LED lamp is started, the heat dissipation of the product can be detected by touching the surface temperature of the product. If the temperature of the product continues to rise within 1 hour, instead of the temperature being stable for up to 30 minutes, do not select the product because of heat dissipation. , resulting in shortened product life.

Fiber optic adapters are typically used to connect two fiber optic cables together. They come in versions to connect single fibers together (simplex), two fibers together (duplex), or sometimes four fibers together (quad). Adapters are designed for multimode or single-mode cables. The single-mode adapters provide more precise alignment of the tips of the connectors and can be used to connect multimode cables. The reverse is not suggested as this might cause misalignment of the small single-mode fibers and loss of signal strength (attenuation).

Optical attenuators are commonly used in fiber-optic communications, either to test power level margins by temporarily adding a calibrated amount of signal loss, or installed permanently to properly match transmitter and receiver levels. Sharp bends stress optic fibers and can cause losses. If a received signal is too strong a temporary fix is to wrap the cable around a pencil until the desired level of attenuation is achieved. However, such arrangements are unreliable, since the stressed fiber tends to break over time.


Optical attenuators can take a number of different forms and are typically classified as fixed or variable attenuators. What's more, they can be classified as LC, SC, ST, FC, MU, etc. according to the different types of connectors.

Sijee provides different types of Optical Fiber Attenuator, Fiber Optic Attenuator, Fiber Optic Fixed Attenuator, FC Fiber Attenuator.

Fiber Optic Attenuator

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