Type of LED What is a COB LED? It looks as though it uses a single, rather than multiple LED chips to generate the light.If this is so, what is the difference in light dispersion, or spread.Thank you. Answers Our new LED COB (chips on board) range incorpoates a new technology of LED packaging for LED light engine. This is where Multi LED chips are packaged together as one lighitng module. When the LED COB lights up, it takes the appearance of a light panel.