Ceiling mounted in 35mm Kaiser socket, Brightness Sensor with constant level light intensity to control up to 3 light rows, Brightness value can be read out, Orientation light (Brightness and time adjustable), Day/night mode with separate settings, 35mm Kaiser socket (Installation depth 45mm), Dimensions (W x H x D): 43mm x 43mm x 30mm, Integrated bus coupling unit, 3 years warranty.