COB LED has good thermal performance, long lifetime, and lower power loss. Heat dissipation is good and easily manageable. Only about 30% heat of High Power LED.
Among different LED components such as high power LED, SMD, dip etc, COB LED is best in less thermal resistance and cooling. COB LED is better lighting effect, it is no dizzy, no uncomfortable glare, no zebra strips. When it light up, it looks smooth and like a lighting panel.
However, the SMD, HP, 5mm LED is heavy dizzy, uncomfortable glare, heavy zebra strips. When it is light up, it looks dots. A Milky or diffused cover can improve, but at the same time it cause light loss.