The study was performed under the witness of color research institute in Japan, the purpose is for different color helmet, vehicle lights, street lamps lighting at night, under the environment of mixed effects on driving safety. Sample, test content, is ten (male, female all five of them) age from 19 to 34, eyesight respectively from 0.9 to 1.5 of the operator, in 15 different under the condition of the same light color distance to distinguish with the naked eye.

Finally, the result of the "black" the visual range of the shortest, and only 9.5 meters. The color of the most prominent is the "fluorescent yellow", visual range has reached the black 5 times, is 47.5 meters; "White" later, visual distance of 47.1 meters; After is "fluorescent orange" 43.8 meters, 43.7 meters of "yellow", "fluorescent green" 34.2 meters. This experiment, confirmed the not any fluorescent color, than the ordinary color has better visibility.