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 or non-metallic materials, providing a standard power interface

2. Pattern: Use a signal lamp with a light distribution design mask, 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. The pattern of turning non-motor vehicle signal lights and crosswalk signal lights is allowed to be outlined by LEDs;

3. The size and angle of the covering edge: the length of the covering edge: 525mm; the included angle of the covering edge: 68 °, the covering angle of the covering edge: 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.