LED lighting in large scale often requires a COB (chip on board), Engine, Module, or Strip. COB lighting combines numerous LED die onto one substrate, taking up much less space than a traditional array of SMD LEDs. LED engines combine SMD LED's with resistors to create a ready to use light. LED modules use tiny LED's similar to a COB but they are still easily individually visible unlike with COB's. These are available in different color options, CCT values, lumens, current, and voltage options. They also come in an array of configurations such as strips, flexible strips, rectangles, discs, and starboards.