... of-the-art aluminum fin heat sink stystem that is efficient,light weight and compact with fashion appearance.2, Not ... Luminous efficiency output, low lumens decline, less than 1% after 1000hrs .3, Cooling performance is good, in laboratory , work 24 hours ... 65 °C .4, Drive power supply quality is steady, constant pressure constant current, with filtering . Capacitance by domestic a line brand, ...