High-density class LED technology is the most recent industry leading innovation to bring immediate performance improvement for both discrete high power LEDs and COB arrays.By leveraging the systemic innovations in substrate technology,chip architecture,novel phosphor and ceramic package,high-density class LEDs with higher optical control factor (OCF) could get much higher efficacy & light output and center beam candlepower (CBCP) with narrowed beam angle.High-density class LEDs enable lighting manufacturers to improve the performance of any lighting design,make remarkable energy-saving,create smaller and less expensive systems,and develop new lighting solutions that were previously not possible.High-density class LEDs are not only valuable for current replacement market,but also beneficial to emerging market.