Lamp of traffic light

A lamp of a traffic light, comprising:

• a light guide plate, a protective cover, a light reflection plate, a light-emitting strip, and a circumferential frame;
• the light guide plate having one side defining a light emitting surface and an opposite side defining a bottom surface, an outer circumferential surface arranged between and circumferentially surrounding the light emitting surface and the bottom surface, the light emitting surface comprising light blocking points formed thereon and arranged at intervals;
• the protective cover being made of a light-transmissive material and comprising a convex portion and a circumferential flange, the circumferential flange circumferentially surrounding an outer edge of the convex portion;
• the light-emitting strip comprising a circuit substrate and a plurality of light-emitting diode (LED) lights arranged on the circuit substrate, each of the LED lights being electrically connected to the circuit substrate, the circuit substrate being flexible and bendable;
• the light reflection plate being positioned against and in contact with the bottom surface of the light guide plate and having a surface facing the light guide plate bottom surface, wherein the surface facing the light guide plate bottom surface forms a light reflection surface with a light reflecting effect;
• the circumferential frame being in the shape of a ring and comprising an inner circumferential groove, the inner circumferential groove being in communication with an interior surrounded by the circumferential frame, a wall surface of the inner circumferential groove forming a light reflection surface with a light reflecting effect, so as to form a closed chamber for reflecting light;
• and
• the protective cover being positioned against and in contact with the light emitting surface of the light guide plate, wherein the light reflection surface of the light reflection plate being positioned against and in contact with the bottom surface of the light guide plate, the light-emitting strip circumferentially wrapping around the outer circumferential surface of the light guide plate, each of the LED lights being positioned on and in contact with the outer circumferential surface of the light guide plate, the protective cover, the light guide plate, the light reflection plate, and the light-emitting strip being received in the inner circumferential groove of the circumferential frame and surrounded by the circumferential frame to be combined together.