has its distinct specificity

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The number of tests: 500 small scale, pilot 2000. Test methods; first raised the voltage 250V, turn off the power, then the aging platform product installed,business signs, the switch three times, each time interval of 8 seconds, then off, then voltage to 170V, power observation,led message sign, the last tune the voltage to 250V, 2 hours after the aging, the switch 3 times at intervals of 8 seconds, the end of aging. In the above testing process problems are found substandard products, in need of repair.
: With the growing number of tunnel projects, tunnel construction in modern transportation play an increasingly important role. Tunnel is a closed space, natural light can not light them, in order to ensure the continuity of driving and vehicle safety of human life, even during the day throughout the internal need of artificial lighting, tunnel lighting is an integral part of the tunnel construction.
Keywords: tunnel lights, LED tunnel lamp, tunnel lighting. Automobile exhaust, noise, vibration,LED message board, polluted air, corrosive gases, moisture and other harsh environment the formation of the special nature of tunnel lighting. In order to give vehicular traffic and pedestrian lighting to provide a safe and comfortable environment,business neon sign, the following step by step analysis described by the tunnel lighting design ideas.
Unlike the road tunnel lighting lighting, has its distinct specificity, its security concerns in the lighting system is particularly important. Lighting programs in the design of the tunnel, taking into account human factors in light adaptation and dark adaptation, attention to transitional space and transitional lighting design. Adaptability to meet the requirements of the eye, take the tunnel entrance in the shade for a period of transitional lighting in order to guarantee a certain visual requirements.
Exit the tunnel time is very short due to adjustment, generally less than 1s, it may be other treatments. Usually there are several special tunnel vision questions: (1) before entering the tunnel (daytime): As the great difference between the brightness of the tunnel and outside, so to see from outside the tunnel, the tunnel entrance lighting is very good to see a "black hole "phenomenon.