A light sensing drive circuit, comprising: a filtering and rectifying module, configured to connect to a commercial power, and to generate a rectified voltage according to the commercial power; a power module, configured to connect with the filtering and rectifying module, and to generate a supply voltage according to the rectified voltage; a light sensing module, configured to connect with the power module, and to detect ambient light intensity to generate a light sensing signal; a sampling module, configured to connect with the filtering and rectifying module, and to generate a sampling signal according to the rectified voltage; a drive module; and a main control module, configured to connect with the light sensing module and the sampling module, and to generate a control signal of a preset duty cycle according to the light sensing signal and the sampling signal when the drive module is turned off by the control signal; the drive module comprising: a second drive module, configured to connect with the main control module and the filtering and rectifying module and to generate a driving voltage according to the control signal and the rectified voltage; and an LED module, configured to connect with the second drive module and to emit light according to the driving voltage; characterized in that, the drive module further comprises a switch module, configured to connect with the LED module and the main control module, and to turn on or turn off the driving voltage based on the preset duty cycle according to the control signal, wherein the switch module comprises an optoelectronic isolator and a MOS transistor; an anode of an illuminator of the optoelectronic isolator is an input end of the switch module for inputting a control signal, a cathode of the illuminator of the optoelectronic isolator is grounded, a first end of a light receptor of the optoelectronic isolator is connected to a DC power supply, a second end of the light receptor of the optoelectronic isolator is connected to a gate of the MOS transistor, a drain of the MOS transistor is connected to a cathode of the LED module, and a source of the MOS transistor is grounded. a filtering and rectifying module, configured to connect to a commercial power, and to generate a rectified voltage according to the commercial power; a power module, configured to connect with the filtering and rectifying module, and to generate a supply voltage according to the rectified voltage; a light sensing module, configured to connect with the power module, and to detect ambient light intensity to generate a light sensing signal; a sampling module, configured to connect with the filtering and rectifying module, and to generate a sampling signal according to the rectified voltage; a drive module; and a main control module, configured to connect with the light sensing module and the sampling module, and to generate a control signal of a preset duty cycle according to the light sensing signal and the sampling signal when the drive module is turned off by the control signal; the drive module comprising: a second drive module, configured to connect with the main control module and the filtering and rectifying module and to generate a driving voltage according to the control signal and the rectified voltage; and an LED module, configured to connect with the second drive module and to emit light according to the driving voltage; characterized in that, the drive module further comprises a switch module, configured to connect with the LED module and the main control module, and to turn on or turn off the driving voltage based on the preset duty cycle according to the control signal, wherein the switch module comprises an optoelectronic isolator and a MOS transistor; an anode of an illuminator of the optoelectronic isolator is an input end of the switch module for inputting a control signal, a cathode of the illuminator of the optoelectronic isolator is grounded, a first end of a light receptor of the optoelectronic isolator is connected to a DC power supply, a second end of the light receptor of the optoelectronic isolator is connected to a gate of the MOS transistor, a drain of the MOS transistor is connected to a cathode of the LED module, and a source of the MOS transistor is grounded.