THE ST MR16-B05 is in a standard GX5. 3 base for you to retrofit your design with the LED configuration. It is comprised of 3 watt 3 in 1 (R G B) high power LED emitter as light source. With great thermal management it works at either AC12V or DC12V. This LED Accent Light is to get you desired colored light with significant operating cost savings. It can be well suited for the use of tracks, cables and pendants in interior illumination, retail, exhibit, display and many more lighting application.