... ,9pcs/ctn ,CTN SIZE : 450*450*350mm1.What is COB ? Chip-on-Board, or COB, refers to ... result of the shorter interconnection paths.2. What is COB Advantage ?1) Reduced space requirements;2 ... finish color, creating a mood that is warm and cozy.3. Material : Aluminum alloy and PMMA / ... Driver : External driver, waterproof, IP65.7. Dimmable is availble. Application:Home /office lighting ,display case ...