Why LED fluorescent power supply must be constant?

Update:26 Jul 2018
Summary:

LED's semiconductor characteristics determine its impac […]

LED's semiconductor characteristics determine its impact on the environment, such as temperature, LED is a current-sensitive element, LED current increases will directly lead to increased heat, long time exceeds rated current work, LED chips will be in a high temperature state for a long time, will greatly Reduce the life of the LED. The LED constant current power supply can ensure that when the voltage and other factors change, its operating current does not change, so as to protect the LED chip from being damaged by high temperature, and the so-called power supply is easy to destroy.