A lighting device includes: a bearing member, provided with a circuit switching component, wherein the circuit switching component is connected to an external power supply, and is provided with at least one first plug portion； and at least one light source component, comprising: a housing, provided with a first accommodation portion and a second accommodation portion； one or more light source units, each light source unit has one or more pairs of power supply pins； a drive circuit component, comprising a second plug portion, the drive circuit component is used for switching the external power supply into supply power to the light source unit； and a conductive member, provided with through holes for inserting the power supply pins, wherein the conductive member is in conductive contact with each electrical connection pin.
