5050 is the size of this SMD led, led chip size is 5.0mm x 5.0mm, compared with 3528 SMD led, the size is larger and brighter. 5050 LED chip is usually used for 60 LEDs per meter of strip light, can be used for RGB LED strip lighting and color changing LED tape lighting. Shenzhen Moonleds offers the highest quality 5050 SMD LEDs on the market.