Grinding a manufacturing except hardware LED mess

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most of the current use of road lighting hid light source, is the most frequently used high-pressure sodium lamp, while the use of metal halide lamp is also increasing. the street lighting and the use of cfl light hid light source. then, in order to save energy in our country, is the increasing use of led light source or free road lamps, irresistible, much of traditional light sources (hid) demoted down the momentum. recent abroad will be applied to road and street .outside signs
1.1962 advanced semiconductor laboratory in ge invented the first visible led for lighting the hair at the time the materials used are gaa, red light, the drive current of 20 ma, the luminous flux is only a few lumens per thousand, the corresponding led efficiency is only about 0.1 lumens / watt. 2. from the early to mid 70's, technology advances quickly, luminous efficiency increased to 1 lumen / watt, and the hair of other colors available led light sources have also covers from red to yellow-green spectral range. 3. to the early 80s, there has been gaalasled light source, making the late 80's when the red led light efficiency of 10 lumens / watt.outdoor signs
according to the existing road tunnel lighting design, laid a large number of highway tunnel lighting, but according to the actual use situation, because of electricity costs a huge, open only to the basic section of the majority of lighting. thus, according to people's visual recognition principle and the principle of tunnel lighting, from a security point of view, the basic section of proposed illumination of indicators can be reduced, transitional lighting settings can be simplified way of thinking.according to the characteristics of x-lo agreement to achieve an agreement based on x-lo intelligent lighting systems. platform design for remote control and power the carrier a detailed study of key technologies, development platforms based on remote control and x-io protocol intelligent lighting system, tested after use that to achieve a reliable and stable communication effects, and x-can and foreign io products compatible. remote interface used in power line carrier interface mode on the other power line carrier communication system has a certain practical and reference value.outdoor led signs