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LED wall washer is an indispensable part of the landscape lighting project

source:Industry News Popular:Silicone Neon release time:2021-05-20 Article author:sznbone

  LED wall washer light-emitting diodes are made of III-IV compounds, such as GaAs (gallium arsenide), GaP (gallium phosphide), GaAsP (gallium arsenide phosphorous) and other semiconductors, and its core is a PN junction. Therefore, it has the I-N characteristics of a general P-N junction, that is, forward conduction, reverse cutoff, and breakdown characteristics. In addition, under certain conditions, it also has light-emitting properties. Under the forward voltage, electrons are injected into the P zone from the N zone, and holes are injected into the N zone from the P zone. Part of the minority carriers (minority carriers) entering the opposing area recombine with the majority carriers (multiple carriers) to emit light.

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  Assuming that light emission occurs in the P region, the injected electrons directly recombine with the valence band holes to emit light, or they are first captured by the luminescent center and then recombine with the holes to emit light. In addition to this luminous recombination, some electrons are captured by the non-luminous center (the center is near the middle of the conduction band and the dielectric band), and then recombine with the holes. The energy released each time is not large, and visible light cannot be formed. The greater the ratio of the luminous recombination to the non-luminous recombination, the higher the light quantum efficiency. Since the recombination emits light in the minority carrier diffusion region, the light is only generated within a few μm close to the PN junction surface.

  Power size: The power size of the LED wall washer determines its projection distance. Generally, there are 18W, 24W, 36W, 48W and other parameters. But the power is not fixed. The power can be flexibly changed according to requirements! Generally, high-power LED wall washers refer to single-row, multi-row linear LED floodlights!

  Voltage: The voltage of the LED wall washer can be divided into DC DC and AC AC. Generally, the built-in power supply is externally connected to AC220V (Japan AC110V) city power, etc., if it is external, it is generally low-voltage DC24V, DC12V, DC27V and so on. According to different requirements and different manufacturers, the voltage is also different.

  IP protection level: This is an important parameter of the LED wall washer, and it is also an important indicator that affects the quality of the current LED flood light. It is best to require the waterproof level to be above IP65, and relevant pressure and shatter resistance are required. Crack resistance, high and low temperature resistance, flame resistance, impact resistance aging grade.

  Working temperature: Because LED wall washers are usually used outdoors more, this parameter is more important, and the temperature requirements are relatively high. Generally, the outdoor temperature we require can work at -40℃+60℃.

  First of all, in recent years, LED wall washer has started to occupy its own position in the lighting market by virtue of its own unique lighting advantages. LED wall washer not only has a long service life, but also has the characteristics of rich colors and different shapes. It can be used not only in urban lighting projects, but also in the wall lighting of buildings and the wall lighting of some historical buildings, etc. It has a unique effect in the lighting of the outline of the building, and LED The use of wall washer is getting wider and wider.

  Secondly, the wider the application range of LED wall washer, the more and more promising the future development trend of LED wall washer is. The main reason is that the lighting of the wall of the building has changed from indoor to outdoor. From the local lighting to the later overall lighting, the entire lighting area and technology are constantly improving. This is undoubtedly the increasing application range of LED wall washer, which directly affects its market share in the future.

  Finally, as the coverage rate of urbanization is getting bigger and bigger nowadays, in the era of more and more different forms of tall buildings, LED wall washer will continue to play an important role in future urban lighting projects, even It will become an indispensable part of the future landscape lighting project.


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