A lighting assembly is adapted to be connected to at least one conductive connection hole of an illumination device. The lighting assembly comprises at least one lighting cell and connection mechanism, wherein the lighting cell comprises a base, at least one electrical connector and a lighting unit. The electrical connector and the lighting unit are connected to the base, and electrically connected with each other. The lighting unit has a plurality of lighting circuits linearly arranged thereon, and one end of the connection mechanism is electrically connected to the electrical connector. When the lighting assembly only comprises one lighting cell, the other end of the connection mechanism is connected to the electrode connection hole; while when the lighting assembly comprises a plurality of said lighting cells, the other end of the connection mechanism is selectively connected to the conductive connection hole and the other electrical connector of the neighbor lighting cell.