... Ceiling Light's Key Specifications/Special Features:Light source: 5 x 1W Cree/Edison LEDColors: warm white, cool white, red, ... 500KInput: Constant current (1 x PCB + 5 x LED, 350mA, 5W)Constant voltage (1 x PCB + 5 x LED + 350mA current regulator on PCB, 12V DC, 5W ... of 25°)Ambient temperatures: -40 to 50°CDimensions: 83 x 45mmCutout size: 68mmGood heatsink, low working temperature and long working ...