When LED works, about 80% of the electric energy can be converted into heat energy,
and 20% of the electric energy is converted to light energy, while the temperature of the LED
is inversely proportional to the rate of light out. At the same time, the temperature has a direct
relationship with the life of the LED, the luminous decay and the bias of the chromatic aberration,
so a good heatsink will make the best function of the LED.