Compared with integrated high-power LEDs (packaged into tens of watts, hundreds of watts according to different requirements): Integrated high-power LEDs generally integrate dozens or even hundreds of LED chips into a small space, resulting in power density. If it is too large, the problem of heat dissipation is difficult to solve, and the light decay is serious; in addition, the integrated light source is relatively large, which is not conducive to light distribution, and cannot achieve accurate secondary light distribution. Only reflectors and simple convex lenses can be used, which is difficult to achieve. The ideal light distribution of road lighting, the utilization efficiency of light energy irradiated to the road is low, and the efficiency of lamps is low, and the light loss is large; in addition, the production process is more complicated, the production yield is low, a certain chip is broken or solid crystal, welding wire If there is an abnormality in the process, the entire light source module will fail, and the LED is not convenient for mass production, and the output is low. 2. Compared with low-power 5MM and other packaging forms: Low-power 5MM LED has inherent deficiencies in parameters such as heat dissipation and light efficiency for road lighting applications. The lifespan is not guaranteed and is not suitable for road lighting. 3. Advantages of a single 1W high-power LED: A single 1W high-power LED is integrated through multiple planes, generally using dozens or even hundreds of 1W LEDs in an array to apply to road lighting. Because its single power is small and evenly distributed on the light-emitting plane of the lamp, the heat density is small, the thermal resistance of the system is small, the LED temperature is low and balanced, and the lifespan can be guaranteed; It is easy to do light distribution design, can achieve a very ideal rectangular light spot, the utilization rate of light energy can be optimal, and the uniformity can be very high, reaching 0.7; the light distribution design is reasonable, and the efficiency of lamps can also be maximized; Moreover, since the light distribution of each LED is exactly the same, the number of LEDs can be simply changed according to the actual road illuminance requirements without changing the optical system, and the application is very flexible; The light comes from all the LEDs, and the light intensity in this direction is dispersed to the light-emitting surface of the entire lamp. The surface of the lamp has low brightness, the glare is very weak, and there is no obvious dazzling feeling; and even if some of the LEDs are broken, it is only The overall illumination of the road surface is reduced, and there will be no significant reduction in a certain area, which basically does not affect the actual lighting. Through the above comparative analysis, the packaging method of a single 1W high-power LED at this stage has many advantages in terms of luminous efficiency, heat dissipation, life, light distribution and mass production, and is the most suitable packaging method for LEDs for road lighting at the latest stage. .