1. Appearance: the signal light emitting unit, housing, and shielding surface are smooth, without cracks, silver wires, no obvious intersections and burrs. The color of the signal light housing is significantly different from the color of the light signal. The signal lamp housing is made of metal material or non-metallic material, and provides a standard power interface.

2. Pattern: The signal lamp with light distribution design mask is adopted, and the light emitting surface of the light emitting unit is uniform and there are no spots or areas that are too bright or too dark; a light emitting diode (LED) light source and a transparent patterned signal lamp are used unless the motor vehicle Signal lights, left-turn non-motor vehicle signal lights and crosswalk signal lights are allowed to be outlined by LEDs, and the remaining patterns are evenly arranged by LEDs.

3. The size and angle of the shadow: the length of the shadow: 525mm; the angle of the side of the shadow: 68 °, the angle of the shadow: 290

4. Insulation resistance: the insulation resistance between the live parts of the signal lamp and the housing is> 500Ω;

5. Dielectric strength: 1440V test voltage is applied between the live parts of the signal lamp and the housing for 1min, and no flashover or breakdown occurs during the test.

6. Starting instantaneous current: the instantaneous current when the signal lamp starts is less than 2A, starting response time: 26ms; closing response time: 67ms.