The design of outdoor LED lighting fixtures should comply with the latest technical specifications for outdoor lighting fixtures promulgated by our country, as well as the urban road lighting design standards.
#1 Working environment
Due to the harsh working environment, LED outdoor lighting fixtures are affected by wind, rain and sun, ultraviolet radiation in the sun, temperature difference between day and night, sand and dust in the air, chemical gases and other conditions, and the lamps and lanterns are subject to natural aging treatment year after year. . The influence of these factors should be fully considered during design.
#2 Selection of LED lighting materials and heat dissipation methods
The shell and the heat sink are designed as a whole to solve the heating problem of LED lighting fixtures. This method is better. Generally, aluminum or aluminum alloy, copper or copper alloy, and other alloys with good heat conductivity are used. Heat dissipation includes air convection heat dissipation, strong wind cooling heat dissipation, and heat pipe heat dissipation.
What kind of heat dissipation method to choose has a direct impact on the cost of the lamp. It should be considered comprehensively and the best solution should be selected in conjunction with the designed product.
The design and material selection of the lampshade is also very important. At present, transparent plexiglass and PC materials are used. The traditional lampshade is made of transparent glass. What kind of lampshade material to choose is related to the product grade positioning of the design. Generally speaking, outdoor lamps The lampshade is preferably a traditional glass product, which is the best choice for making long-life, high-end lamps. Lampshades made of transparent plastic, plexiglass and other materials are better for indoor lamps, but their lifespan is limited when used outdoors, because factors such as outdoor sunlight, ultraviolet rays, sand and dust, chemical gases, and temperature differences between day and night shorten the lampshade aging life. , Secondly, the pollution is not easy to clean up, which reduces the transparency of the lampshade and affects the light output.
#3 Packaging of LED chips
At present, most domestically produced LED lamps (mainly street lamps) are assembled by connecting multiple 1W LEDs in series or in parallel. This method has higher thermal resistance than products with advanced packaging technology, and it is not easy to produce high-quality lamps. Or use 30W, 50W or even larger modules for assembly to achieve the required power. The packaging materials for these LEDs are packaged with epoxy resin or silicone.