The most popular LED chips on the market today are 2538 and 5050. the choice of these two is based on many factors. 2835 LED SMD with a size of 28mm x 35mm LED chip installed, and 5050 LED SMD with a size of 50mm x 50mm LED chip installed. Each of 5050 SMD LED than each of 2538 SMD led to produce more light, but because of the amount of light generated so it needs a heat sink, while 2538 does not need a heat sink. In addition, 2538 SMD is a single chip, while 5050 led is three chips. Welcome to browse our SMD led to choose the most suitable led SMD products for you.