15w recessed led downlight Voltage : AC 100-240V SIZE:diameter 85mm,diameter 70-75mm, thickness:115mm Luminous flux :870lm NEW 15w recessed ... Net Weight : 373g ,9pcs/ctn ,CTN SIZE : 450*450*350mm1.What is COB ? Chip-on-Board, or COB, refers to the semiconductor ... well as improves its performance as a result of the shorter interconnection paths.2. What is COB Advantage ?1) Reduced space requirements;2 ...