Series driver for LED lamp, and LED lamp placed in fluorescent lamp

The invention provides a lamp driver (10) for an LED lamp (1) with two or more LEDs (50), and the LED lamp placed in a fluorescent lamp. The lamp driver (10) comprises a lamp driver voltage input port(11) configured to connect the lamp driver (10) to a power supply, one or more switches (26, 27 and 28) configured to change a connection mode of the LEDs (50), and an MCU (20) configured to detect avoltage supplied by the lamp driver voltage input port (11) and adjust the switches (26, 27 and 28) according to the detected voltage. 本申请提供一种用于具有两个或更多个LED(50)的LED灯(1)的灯驱动器(10)和用于放置在荧光灯灯具中的LED灯。灯驱动器(10)包括：灯驱动器电压输入端口(11)，其被构造为将灯驱动器(10)连接到电源(60)；一个或多个开关(26、27、28)，其被构造为改变LED(50)的连接模式；以及MCU(20)，其被构造为检测由灯驱动器电压输入端口(11)供应的电压并且根据检测到的电压来调整开关(26、27、28)。