... White, R,G,B,Y Color Temperature 2800-3000K / 4500-6500K / 6000-7000K Beam Angle<Degree> 120degrees Lumen/Watt1872lmCRI Warm white: 80 ... copper heat 3)Body temperature: Less than 60 degree Celsius 4)LED working temperature: Less than 62 degree Celsius 5)Temperature: -20 to 50 degree Celsius 6)Brightness degradation ... a common diode like 1N4148 has a drop of approximate 0.7V, a LED may has a drop of 3.6V ...