Gap Lighting introduces a smart dimmable 15W IP54 rated downlight that is revolutionary through incorporating RGB and CCT intelligent technology. Emitting a colour changing temperature this downlight is a versatile application solution. The downlight has a guaranteed lifetime of up to 50000 hours so that you can be absolutely confident in the quality of your purchase. Downlight Dimensions Diameter 190mm x Height 50mm. Cut out diameter 180mm. Use T-4WIFI to enable SMART phone control. Please Note 4-zone remote required T-RGB-CCT T-4WIFI T-4Z-WALL T-4Z REMOTE T-8Z-REMOTE.