4' LED Stairwell Light fixture with built-in Motion Sensor, from Keystone. With it's energy efficiency and versatility, it is ideal for Commercial & Retail applications, including Stairwell & Corridor lighting. The fixture has built-in switches to adjust the Wattage & Color Temp (CCT). Users can adjust the Wattage to 30W, 35W or 45W in either 3500K, 4000K or 5000K CCT. This allows users to set the light to their preferred Brightness and Color, making it extremely flexible! It is also able to Dim the Brightness when using with 0-10V Dimmer Switches. With the included Motion Sensor, the light will turn on fully when it detects motion. Users then select the length of time from when motion was last detected, when the light will automatically dim the lighting to a specific level that is selected by the user. The durable KT-SWLED45PS-4A-8CSA-VDIM-P is DLC Listed and comes backed by a 5 Year Warranty.