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: The signal lamp with a light distribution design mask is used. 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 wheel is clear. When the signal light is placed according to normal work, two “8” shapes composed of LED arrays can be seen.

3. Size and angle of covering edge: length of covering edge: 310mm;

4. Insulation resistance: The insulation resistance between the live parts of the signal lamp and the housing is> 92MΩ.

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.

7. Normal timer status: The countdown display is synchronized with the corresponding signal phase, and the display is consistent and without garbled characters. The phenomenon of code loss, when the road traffic signal controller interrupts the output, or turns into yellow flash control, the countdown can display a black screen at the end of the corresponding position of the current signal.

8. Learning status: The countdown timer can display a black screen during the learning period within 2 signal periods.