Composition and description of LED lighting fixtures

LED street light The main components of LED lighting fixtures are: LED chip drive circuit board shell. These two parts constitute the main body of LED street lamps and LED garden lamps and basically determine the quality and performance of LED lighting lamps. According to the power, LED chips can be divided into low-power chips, medium-power chips and high-power chips. The specific size of the chip depends on the actual production level of different chip manufacturers, and there are no specific requirements. As long as the process is passed, the chip size can increase the unit output and reduce the cost. The photoelectric performance will not change fundamentally. The unit current density of the chip is basically the same. The luminous brightness of chips of different sizes can be the same, but their working life is completely different, because the higher the current density per unit area of u200bu200bthe chip, the shorter the working life, which is also the reason for the different prices of LEDs with the same brightness. The main wavelength of high-power LED is the main parameter that determines the color of the LED. Whether it is selected correctly or not will affect the lighting effect. The two parameters of LED half-wavelength width and color purity actually represent the same optical performance of LED. High-power LED chips allow the higher the junction temperature, the better the product performance and the more expensive the price. The maximum operating case temperature of high-power LEDs is a parameter required for packaging technology. The lower the maximum operating case temperature is, the higher the packaging heat dissipation requirements are, indicating that the packaging heat dissipation technology is better. The thermal resistance parameters of high-power LED light sources directly reflect the level of packaging technology. The better the heat dissipation technology, the lower the thermal resistance, the smaller the light decay, and the longer the lamp life. To match it, it is also necessary to provide a constant current power supply to drive the LED to ensure the safety of high-power LED use and achieve the ideal luminous intensity. In the field of LED lighting, it is very important to choose a good LED driver IC to reflect the characteristics of energy saving and long life. Without a good driver IC to match it, the advantages of LED street lighting and LED garden lighting cannot be reflected. As far as the current situation is concerned, the power of I and ED single chips on the market is usually around 1 to 5W, and the light output is only a few hundred lumens. In order for LEDs to be used on a large scale in public places such as road lighting, the luminous flux of LED light sources must reach thousands or even tens of thousands of lumens. Such a high light output cannot be achieved by single-chip mining. In order to meet such high light output requirements, most of the light sources at home and abroad are combined with multiple LED chips (usually 1W) in a lamp to meet the requirements of high-brightness lighting. This method solves the problem of insufficient brightness of single-chip light sources to a certain extent. The problem. Company: Shanghai CHZ Changhui Lighting Technology Co., Ltd. Website: www.chz-lighting.com