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In COB packages many LED chips are usually attached to substrate with a non-conductive adhesive. LED chips are wire bonded together to make different LED setups. The amount of single LED chips, inside a one COB LED package, can vary from a few pieces up to several hundred pieces. The substrate is located on the base material. The base material of COB LED is usually MCPCB or ceramic PCB. COBs often have blue diodes and use yellow phosphor layer to convert light to desired color temperature. By using imported mirrored aluminum substrates, we can create the industry’s highest lumen LED COB source