I. Introduction 1. Illuminant adopts ultra bright LED, and lens is made of PMMA material, enjoying good lighttransmission. 2. The lightemitting unit is powered by constant current; switching power supply is used for power source to boost power factor. 3. Molded by aluminum diecasting, lamp housing is light, durable, reliable and stable. Plasticspraying outer surface is beautiful and durable, and the unique exterior design units can be combined with any unit, and installed vertically or horizontally. 4. The product can not only operate harmoniously with adaptive signal control system such as SCATS, but also improve the quality of power supply. II. Performance Parameters 1. Supply Voltage: AC176V ~ 253V 50Hz ± 3 Hz 2. Apparent Power: light-emitting unit <25VA 3. Power Factor: > 0.9 4. Ambient Temperature: -40 ℃ ~ +70 ℃ 5. Visual Angle: > ± 300 6. Visual Distance: > 300M 7. Service Life: > 50,000 hours 8. Housing Protection Grade: IP54 9. Rated Wind Velocity: > 150 km/h 10. All parameters are in line with GB14887-2003 standard III. Specifications Light-emitting Unit: 400; 300 Signal Pattern: Arrow (optional arrow direction), U-turn, arrow (U-turn) and two-color digital display Main Performance Parameters of U-turn Indicator 1. Power Supply Voltage: Rated voltage: 220VAC; voltage range: 220V ± 15%; 2. Power Frequency: Nominal frequency is 50Hz; frequency range: 47Hz-63Hz; 3. Power Factor: > 0.90; 4. Ambient Temperature: -40 C - +70 C; 5. Humidity: 10% - 95%; 6. Housing Protection Grade: IP54; 7. Dimensions of Display Surface: 300*300mm; 400*400mm 8. Apparent Power: Red <15W; yellow <15W; green <15W 9. Light-emitting Diode (LED) Wavelength: Red 625 ± 5 nm; Green 505 ± 5 nm; 10. Optical Performance: Center Brightness: > 4000cd/m2