If it is not enough voltage, low voltage or there will be no bright lights or not enough light, if the supplier problems, leakage may be, you can use IR curve QT2 test to determine the wavelength of light used lead-free production, LED is not a requirement Use of lead-free, LED Boiler in the front wave over time can withstand the temperature and time are limited. World-class LED can only afford 3 seconds to 5 seconds of the impact of high temperature, wave-dip tin temperature not more than 260 degrees.

The light does not shine often enough brightness and the situation may be one of VF, IR-induced high, and the other is not enough brightness of individual lamp brightness level in the lower limit or due to the different levels. You see more than the production of non-performing major When there are no high temperature, high current moment of impact, dealing a blow to the static electricity.

General specifications will have a material note. In fact, more than LED, lead-free solder should be carried out before trial production and * assessment to ensure that all materials be able to bear the high temperature lead-free solder.

Brightness is a spectrum of the scope of the general supplier of different colors, different from all spectra.

LED light manufacturers to reduce costs and provide a general spectral range of companies in this sector. Limits on the LED lights and LED lights under the limits are obvious differences. In this case, in general, more difficult to control.

LED lights because of weak, too easy to WAVE general bad, but replaced by lead-free operation, the temperature should be raised, so it because the temperature of the reasons is also possible that the temperature increase the lead to the LED lamps can not afford. Both cases are mainly looking for suppliers to resolve.

Affected by external factors and the damage

The installation of the side of the road or bridge on the lamps to meet the diverse effects of shock, vibration source from the vehicle in the past, especially the heavy-duty vehicles in the past. When the lamp in a certain place or components and external sources of vibration resonance occurs, will produce components on the circuit or damage. Based on previous practice and experience, as Figure (14), the original solid welding wire and LED map (15), the solid wire connection Tuohan separation took place, mostly caused by the resonance. As in all of the LED lamps and the resistance is to link up the work, so long as the circuit has an open, the lights will not be able to work properly.

By the harsh environment (such as sun exposure, exposed to the elements, vibration and so on) the long-term impact, as well as man-made factors, LED lamps will be closed the original structure suffered varying degrees of damage, dust and rain water seepage would also suffered internal circuit Damage. Such as rain water and electricity in the dust under the corrosion of copper foil; arising from the resistance against humidity and corrosion of lead LED, and so on.
The role of man-caused damage

When the lights on the people to be able to touch the place, often by some people, intentionally or unintentionally, the press, shaking, beating or by the removal of objects and collision damage.

The use of the product safety problem

The above analysis of the various adverse factors on the use of LED products to a certain degree of damage, which in turn damaged the LED products would affect the surrounding environment. This would create a potential environmental and public safety issues.

When the potential of fire damage to the copper lines in the adoption of high-current, when connected virtual wire solder joints loose when the next will have a local high fever, severe when the board will make it happen Kaohu charring.

After the charring of the circuit board through more current and fever, so the final outcome of a vicious circle, that is, charring fire board, LED lamps is an internal circuit ignited a fire wall.

If such incidents in the holiday crowd spate of time; if such incidents in the interior; if surrounded by other flammable liquids; If you have not been found in a timely manner; its consequences will be disastrous.

The risk of electric shock or electric shock due to improper design, installation of screw-top at the end of an electric circuit boards, copper foil, and the other side of the wall in the open, see Figure (23). When the LED lamps can be installed on the people to touch the place where, if someone touches to the screw cap when subjected to electric shocks; rainy day is even more dangerous. If the LED lamps damaged wall has not been replaced in a timely manner, when it was hit to the internal circuits have the danger of electric shock. Because it is different from the previous lamps, just screw the light bulb I live, and its printed circuit on both sides of the slab is equivalent to the bare 220-volt power line, most people have not yet established a sense of protection or aware of the risk. As a result, the installation of such a voltage of 220 volts of LED lamps, or as much as possible on the people not to touch.

Loose or falling loss dropped the most dangerous is LED lamps used for night lighting decoration, often installed on the overpass, the bridge across the street, the buildings along the wall or roof of the wall, which is often the following locations through. As the relatively large amount, the probability of occurrence of cases will drop big. Over time, the material will gradually aging damage in the external force, such as bridge vibration, wind, hail damaged part of the aging will increase in the fall. Should be adequate attention and prevention; for such strengthen the lighting periodic inspection and maintenance.

In short, LED long-life itself is not innate, and it needs good design, good materials, good production process. Similarly, the composition of the LED components and other products also need good design, good components and materials, good production process. So that it can achieve real long-lived, low-power and less maintenance. LED lamp with a beautiful environment at the same time, do not forget the product of bad security environment, and should also enhance the quality of LED light detection.

Reference link: http://www.17led.com/LEDdisplay/2008-04/47.html