A driver head, including a body with a connecting end, a control member, a light emitting element and a power supply element; a control member is pivotally installed in the transversal groove of the body; an electrically conducting plate is contained in the conducting groove of the control member; the outer circumferential surface of a light emitting element is in contact with the body; a plurality of power supply elements are installed in the third groove; a resilient element is installed in the third groove; the control member has a conducting groove, such that the electrically conducting plate can be installed in the conducting groove, and the control member can be turned to drive the electrically conducting plate or the control plane to contact the power supply element, for controlling an electric connection.
