For input devices and luminaire controllers to interact in many applications, a signal pathway is needed. This may be wiring or, more recently, wireless, with control signals sent through the air. This approach eliminates the need for control wiring, resulting in significant benefits, particularly in existing buildings. Using wireless communication, control devices can communicate as discrete devices or as part of networked systems. Click to read this article by Steve Mesh, LC and Craig DiLouie, LC, CLCP.