Because of its low power consumption, high luminous efficiency, long life, energy saving and environmental protection, LED street lamps have gradually eliminated traditional street lamps and become the "main force" of road lighting. Street lamps have a long lighting time, and they are installed outdoors, causing sun and rain. Therefore, the quality requirements of the lamps must be passed. Otherwise, the lamp will be damaged, which will threaten road safety. Therefore, no matter companies, institutions or engineering companies need  distinguish carefully when purchasing street lights,  avoid falling in the procurement trap.

　　The following pitfalls should be paid attention  when purchasing street lamps:

　　??? Trap 1 Counterfeit chips, low-end chips

　　The core of LED lamps is the chip, which directly determines the performance of the lamp! However, some unprofessional manufacturers take advantage of the unprofessionalism of their cusmers, and use low-cost chips from the perspective of cost, so that cusmers can buy low-quality products at a high unit price, resulting in direct economy Loss and cause serious quality risks  LED lamps.

　　??? Trap 2: Configure virtual labels and exaggerate configuration parameters

　　The fierceness of solar street lamps is also accompanied by the reduction of price and profit. The fierce competition has also led  many solar street lamp manufacturers beginning  cut corners and false standard product parameters, such as the wattage of light source, the wattage of solar panels, the capacity of batteries, and even the use of solar street light poles. The materials are all in problems. Of course, this is also caused by cusmers' repeated price comparisons and low prices, and it is also related  the practices of some manufacturers.

　　??? Trap 3 Poor heat dissipation design and unreasonable configuration

　　In terms of heat dissipation design, every time the PN junction temperature of the LED chip increases by 10 degrees, the life of the semiconducr device will be reduced by multiples. Due  the high brightness requirements of LED solar street lights, the use environment is relatively harsh, if the heat dissipation is not solved well, it will quickly cause LED aging and decrease stability. In addition, unreasonable configuration often leads  specific usage conditions that fall short of expectations.

　　??? Trap 4 Copper wire pretends  be gold wire and controller problem

　　Many LED manufacturers try  develop materials such as copper alloys, gold-clad silver alloy wires, and silver alloy wires  replace expensive gold wires. Although these alternatives are superior  gold wires in some characteristics, they are much worse in terms of chemical stability. For example, silver wires and gold-coated silver alloy wires are susceptible  sulfur/chlorine/bromination corrosion, and copper wires are prone  oxidation and sulfidation. For encapsulated silica gel similar  water-absorbent and breathable sponge, these alternatives make the bonding wire more susceptible  chemical corrosion, reduce the reliability of the light source, and use it for a long time. Regarding the solar street light controller, if the controller is faulty, during the test and inspection process, "the whole lamp is off", "the lamp is not switched on time", "partially damaged", "individual LED lamp bead dead light", " "The whole light flickers and ignited" phenomenon.

　　Purchasers need  pay attention  the following issues in the procurement process:

　　▼ Detection

　　When purchasing, the first is the light decay test report, which is a very important link. During the bidding, each company will provide light decay test reports from different units. Some provide self-inspection by their own company, and some third-party inspections. Although the test results in the test report are good, the actual luminous decay gap is huge. The reason is Everyone knows it, so how can we discern the authenticity with insight?

　　First of all, the test report is a designated organization recognized by the Semiconducr Alliance. For example, the Beijing Electric Light Source Quality Supervision and Inspection Center, Shanghai Electric Light Source Quality Supervision and Inspection Center, and the 13th Institute of Semiconducrs, etc., the light decay of the test reports from these units is credible, and the street lamps used for road lighting have high power and generate large amounts of heat. Two problems are explained through the light decay test: the light decay is qualified and the power supply is off. If a street lamp cannot pass in the laborary, can the quality be guaranteed on the road?

　　▼ Street lamp structure

　　After passing the light fading test, the structure becomes a big problem. This problem is rarely paid attention  in the industry, and it is also one of the main reasons for the large light decay in the actual use of street lamps. Everyone knows that the smog area across the country is so large that it not only harms people, but also causes severe degradation of street lights. Especially in northern areas, where there is a lot of dust and smog, after a short period of outdoor use, the entire street lamp surface Covered with dust, its heat dissipation effect is greatly reduced. This is also one of the main culprits that LED street lights are not known  everyone. According  this situation, the luminaire design must be transparent from p  botm. Increase the heat dissipation area exponentially, because no street lamp management department will clean the radiar on time. In long-term use, it can only be washed by rain. After the area is increased, it will leave enough effective heat dissipation area  reduce due  pollution.

　　▼ Heat dissipation

　　Street light decay has a barrel effect, and it’s not good  have a short board. Light decay has troubled everyone for so many years. The problem here is that you can solve the luminous decay if you make the lamp radiar well. No, everyone started  discuss it in the past. Using low-power chip shell-type packaging, but high-power chips will not work. If the chip power is high, the heat cannot be dissipated. This is not the case. The COB package heat is more concentrated, and the aluminum bracket or copper bracket can completely solve the heat conduction problem. But light decay is more difficult  control. The reason is that a good radiar solution may not solve the problem of light decay of the light source. There is a big misunderstanding in the light source package. The COB light source silica gel is o thick. The thinner the silica gel encapsulation, the better, and the chip is convenient. The light-emitting surface dissipates heat, which is why the light decay of the COB light source is not well controlled. (Source/network synthesis)