LED Street Light need to be turned on every day and for a long time. If the quality requirements are not high, not only people are not satisfied, but street light manageme-
nt and maintenance is also a difficult task. So the brightness of the street light is one of the key indicators. Then the following key links should be seized at the beginning of the purchase of street light:
When purchasing, the first is the light decay test report, which is a very important link. At the time of 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 this report are good, the actual light decay gap is huge. The reason is Everyone knows it, so how can we discern the authenticity with ins
First of all, the test report is a designated organization recognized by the Semiconductor Alliance. The detection reports of these un
its are credible, and the street lamps used for road lighting have high power and heat generation. The light attenuation test shows two problems: qualified l
ight attenuation and power off. Street lamps fail the test in the laboratory, can the quality be guaranteed on the road?
Street light structure
After passing the light fading test, the structure becomes a big problem. This problem is rarely paid attention to in
Everyone knows that the smog area of the country is so large that it not only harms people, but also causes great degradation of street lights. Especially in the northern areas, where there is a lot of sand 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 to everyone.the industry, and it is also one of the main reasons for the large light decay in the actual use of street light.
According to this situation, the luminaire design must be transparent from top to bottom. Increase the heat dissipation area exponentially, because no street lamp management department will clean the radiator 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 to reduce due to pollution.
Light source part
Street light decay has a barrel effect, and it’s not good to 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 radiator well. No, everyone started to 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 to control. The reason is that a good radiator 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 too thick. The thinner the silica gel encapsulation, the better, and it is convenient for the chip. The light-emitting surface dissipates heat, which is why the light decay of the COB light source is not well controlled.
Post time: Oct-29-2021