COB stands for Chip-on-Board, which is a type of LED packaging technology. In COB LEDs, multiple LED chips are mounted directly onto a single substrate, forming a single module. This arrangement allows for a higher density of LED chips, resulting in increased brightness and improved thermal management. COB LEDs offer advantages such as compact size, higher efficiency, and better color consistency compared to traditional LED packages. They are commonly used in lighting applications where high lumen output, energy efficiency, and precise lighting control are required, such as track lighting, downlights, and floodlights.

You can find LED lights which are use COB LED as lighting source, or COB LED Strip Lights from here.