Many LED indicators and displays are in the telecommunications equipment. So there is a large need for the LED PCB. And the aluminum plate PCB is essential for dissipating heat.
Automobile indicator lights, brake lights, and headlights usually use LED lights, but they also need an LED PCB.
Besides being used in the indicator lights on computers, the PCB can also be a component of the computer. For example, there are PCB boards on PC boards.
More reading: Guide of LED PCB Assembly