Ex-Or LightSpot HD Switching PIR Sensor is suitable for classroom, corridors, stairs, lobbies, car parks, public places, distribution and storage, lecture theatre, changing rooms and WC areas. Innovative dual mount system requires only one sensor for either flush or surface mount applications. Quick, easy commissioning with simple local controls for time delay and lux level adjustment. Surface mount, can be fixed direct to the ceiling or on to a circular conduit or BESA box.