Luminaire having plug-in style electrical connector, and a separately plug-in mountable motion detector or other actuation device

A luminaire including a light source mounted on a base having a plug-in style connector attached to the internal wires of the luminaire for supplying AC power to the light source. The connector is adapted to mate with a plug-in style connector connected to wires of a J-box. The luminaire may include a second connector for connecting to a conditional actuation device. If the conditional actuation device is not used, a continuous actuation device may be connected to the luminaire. A method of installing a luminaire includes connecting an electrical connector to the wires for connection to a J-box, connecting the luminaire connector to the electrical connector, and mounting the luminaire onto the J-box. A method of selling includes providing a choice from among different style luminaires, providing a choice from among different actuation devices to connect with the selected luminaire, and optionally selling the selected luminaire and actuation device. Methods of replacing and repairing an actuation device are also disclosed.