This design abandons the traditional screwing method of the bulb. When replacing a traditional light bulb, people must first align the connector, and then screw it in the direction of the thread. The cumbersome installation method not only consumes time, but also causes the user to have a sore arm because of maintaining a posture for a long time. Therefore, this design adopts the pressing method of the ballpoint pen, which makes the replacement and placement of the bulb easy and fast.