Patent ID: 8419235

Claim:
A lighting system, comprising: a powering rod for providing power; a first lighting unit, comprising: a housing; a light source disposed inside the housing; an inner ring body disposed in the housing, wherein the inner ring body having a hollowed portion for receiving the powering rod is electrically connected to the powering rod; an outer ring body disposed on the inner ring body and fixed to the housing, wherein the outer ring body is capable of rotating with respect to the inner ring body for rotating the housing correspondingly, the first lighting unit is in a first lighting state when the outer ring body is rotated to a first position, and the first lighting unit is in a second lighting state when the outer ring body is rotated to a second position; and a first control circuit coupled to the light source; and a control unit connected to the powering rod for providing a control signal to the first control circuit through the powering rod to control the light source; a second lighting unit whose structure is the same with that of the first lighting unit, wherein the second lighting unit is used for receiving the powering rod, and the control unit sets the addresses of the first lighting unit and the second lighting unit for controlling the first lighting unit and the second lighting unit according to the addresses being set.