The Xlamp MK-R LED generates an output of 200 lumens using 1 W of power at a junction temperature of 25°C and a color temperature of 5,000°K. According to the manufacturer, Cree Inc., Durham, N.C., this makes the MK-R the brightest commercially available LED today.
The high output comes thanks to the use of silicon- carbide technology and advanced phosphors while a new chip architecture helps to keep junction temperatures low. The LED can deliver up to 1,600 lumens at 15W with a junction temperature of 85°C. Characterized at 85°C, the MK-R is available in color temperatures ranging from 2,700 to 7,000°K and offers minimum color rendering index (CRI) options of 70, 80, and 90 at selected color temperatures.