Xiaogan solar street lights maintenance yangzhou global solar analysed and introduced

1 LED lighting features a light beam transmission function, because almost all equipped with power type LED reflector, and the efficiency of the reflector are significantly higher than the efficiency of the reflectors of lamps and lanterns. In addition, the LED luminous efficacy testing of their own reflector effect is included in

1 lighting function of the characteristics of light emitting diode is a directional light, because almost all power leds are equipped with a reflector, and the efficiency of the efficiency of the reflector was obviously higher than that of light. In addition, since the efficiency of the reflector has been included in the efficiency of light emitting diode light detection. Use leds lamps should make full use of the characteristic of directional emission of light emitting diode, make each of street lamp light emitting diode can directly to areas of the light to be lighting the road surface, and then using auxiliary light distribution of lamps and lanterns of reflector, a reasonable comprehensive of the street lamp light distribution. It should be said that in order to meet the real CJJ45 - 2006, CIE31 and CIE115 standard illumination and intensity of illumination uniformity requirements, street lamps should include three light distribution function, in order to achieve better results. With a reflector and reasonable output light beam Angle of the light-emitting diode has good primary light distribution function. The present invention can according to the height of the lamp and the width of the road to design the installation position of each light-emitting diodes and light-emitting direction, so as to realize good secondary light distribution function. The lamp of the reflector used only as a auxiliary three light distribution device, to ensure the road lighting more even. In the design of the road lighting lamps and lanterns, in the basic set each set the direction of the light emitting diode under the premise of each light emitting diode can use spherical universal joint is fixed on the lamps and lanterns. When the light in different width height and radiation, can adjust the illuminate of each light-emitting diode direction to obtain satisfactory results. In determining the output power and beam Angle of each light emitting diode, can according to E ( lx) =I( cd) /D( m) 2 ( Light intensity and illumination distance inverse square law) Calculate each light-emitting diodes in the basic choosing output light beam Angle should have power, by adjusting the power of each light-emitting diodes and light-emitting diode drive circuit for each different power output of the light emitting diode, light output of each light emitting diode can achieve expected value. The adjustment method is the use of led light source lamp. Make full use of these features, can satisfy the road in the intensity of illumination and under the premise of illumination uniformity, reduce the lighting power density, achieve the goal of energy saving. 2. LED street lamp power supply system is different from the traditional light source. Light-emitting diodes (leds) needed for the constant current drive power is the foundation of guarantee its normal work. A simple switch power supply scheme often damage the light emitting diode device. How to ensure the safety of a set of close packing of light emitting diode is also testing a index of the led street lamp. Light-emitting diodes (leds) on the requirement of the drive circuit is to guarantee constant current output characteristics. Because when leds are working, the junction voltage change area is relatively small, ensure the led drive current constant, basic guarantee the light emitting diode output power is constant. Due to the power supply is not stable in our country, the street light emitting diode drive circuit must have a constant current output characteristics, to ensure a constant light output, prevent light emitting diode power operation.