SMD components are very compact, and they can be easily placed on the board and soldered through reflow soldering. The process is simple and takes less time. SMD LEDs are much smaller than through-hole LEDs. They offer flexibility in designing the LED PCB assembly.
Although SMD LEDs are compact, they provide considerable lumen output, which is the reason they are preferred. Moreover, they consume less energy. These LEDs have three colors (Red, Green, and Blue), so any color can be achieved by the combination.
In SMD LEDs, there are small connectors on both ends of the device. These connectors can be used to join the component to the board.
Advanced Learning: What is the difference between SMT and SMD?