Sunfree Lighting Limited is a high-tech manufacturer specialized in R&D and production of solar led street light

In the fog weather, how to keep the penetration LED street lamp?

by:SUNFREE     2021-02-13
1, the environment of city road lighting since entering the 21st century, especially after 2010, and the serious worsening air quality in our country, the fog haze weather have become a people. LED lights factory it is a solid cold light source, green pollution-free, less power consumption, high photosynthetic efficiency, long life, therefore, the LED street light will become the best choice of the road lighting energy saving reconstruction. LED street lamp which is a kind of based on semiconductor PN junction formation with a weak electricity can glowing efficient solid-state light source, in certain positive bias voltage and the electrical flow injection, injection of holes and injection P N the electronic after spread to have source area by the radiative recombination and emit photons, convert electrical energy directly into light energy. Smog is made up of atmospheric pollution and air pollution from enterprises, automobile exhaust and combustion characteristics of cause, can lead to excess levels of all kinds of suspended particles in the atmosphere, including PM2. 5 is considered to be caused by the biggest 'culprit' haze weather. LED street lamp which is a kind of based on semiconductor PN junction formation with a weak electricity can glowing efficient solid-state light source, in certain positive bias voltage and the electrical flow injection, injection of holes and injection P N the electronic after spread to have source area by the radiative recombination and emit photons, convert electrical energy directly into light energy. In recent years, China's air quality deteriorated sharply, most urban haze days increase, the harm also will increase. In many parts of China, has been included in the fog, smoke as warned of severe weather warning, referred to as 'hazy weather'. In Beijing, for example. Nearly 200 days throughout the year level of air quality in less than two, this means that more than half of the year the weather is fuzzy. Other large and medium-sized cities in China is faced with haze weather, many cities average annual haze days over 100 days. Fog city in most developed economy. In the promotion of LED lights, they tend to play a leading role. Therefore, the study and exploration of the fog weather led street lamp selection is of great significance. 2, some common light source color temperature of LED light source can be divided into warm white, neutral white, cold white 3 kinds. Discharge of the traditional street lamp, sodium lamp radiation concentrated in 589. 0 and 589 nm. Two lines of double D 6 nm, so general about 2300 k color temperature warm white light, there is obvious under the human visual yellow. Leds can make different color temperature of light source through the packaging technology, thus for road lighting offers many different choice. In this paper, organized by 'shenzhen LED chamber of commerce and release! 3, LED street light color temperature choice at present, the LED packaging technology can exert different excitation wavelength of phosphor, or adjust the dosage of the phosphor powder proportion, for different color temperature of white light LED light source. Different light source the light color temperature. The characteristics of low color TPS source is, in the energy distribution, more red radiation, often called 'warm light', after the high colour temperature rise, blue radiation ratio increases in energy distribution, often referred to as 'cold light'. For white LED, the yellow light in the cold light source and the proportion of relatively high, and high quality source of sowing the proportion of relatively high. From the point of view of human visual, low color temperature to give a person the feeling of a warm and stable, and high color temperature, give a person a kind of cool and refreshing, relaxed feeling. 4, the relationship between color temperature and luminous efficiency it is important to note that in the first batch of LED lights for color choose, almost all manufacturers chose the 6000 k, even more than 6000 k, run counter to the high-pressure sodium lamp, why? Because in the early days of fluorescent powder technology conditions, cold white illuminant light emitting diode is more efficient. Compared with the color temperature, people more attention to the physical properties of the light effect. Improve the efficiency of light is the most important way to improve the excitation efficiency of phosphors. Yellow powder excitation efficiency is much higher than orange powder. It is obvious that higher color temperature can be calculated with the higher light efficiency. 5500 ~ 6500 k color temperature light efficiency is higher than in less than 3500 k of warm white 48. 7%.
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