Abstract: A light set circuit with time control function includes a power supply module, a plurality of light emitting modules and a time control module. A first wire receives a positive voltage and a second wire receives a negative voltage, or the first wire receives a negative voltage and the second wire receives a positive voltage, from the power supply module. A first positive pin of a first light emitting module and a second positive pin of a second light emitting module are connected to the second wire, and a first negative pin of the first light emitting module and a second positive pin of the second light emitting module are connected to the second wire. The time control module counts time and controls light emitting states of the light emitting modules.