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Traffic signal lamp is used in the expressway and urban street to prompt the opening and closing of the lane for motorists and drivers. Traffic signal lamp adopts LED to display, and its luminance, reliability, and energy saving is better than incandescent lamps. Features: 1) Mean time between failures (MTBF): >30,000 hours (incandescent lamps only several thousands hours) 2) Its luminance can be changed according to the light intensity of the environment automatically or manually to ensure the visibility in the sunshine and not glare in the night 3) The color of the green LED is blue-green that meets the standard of international traffic signal light, so even color-blind drivers can distinguish it 4) The normal power consumption is below 30W, which is less than the incandescent type 5) Low maintenance fees 6) Easy to stall, with good ability of rain and wind resistance, and is suitable for the bad weather conditions such as rain and fog 7) It can resist in the wind of 30m/s 8) Factory standard: Q/3201/GLL107-1998 Main technique parameters: 1) Interface: RS232, RS422 or relay junction 2) Operating temperature: -20~50°C, very cold type -40~60°C 3) Protection class: common IP43, enhanced IP65 4) Luminance: normal ≥30,000cd/m2, enhanced ≥10,000cd/m2 5) Visible distance: 200m clearly 6) Power consumption: 30W 7) Relative humidity: 95% 8) Mean time between failures (MTBF): >30,000 hours