What is constant current and constant voltage led module?lhlights
When you are purchasing led injection modules from chinese manufacturer,Did you ask them the led module is constant current or constant voltage?
It’s too important to know what is difference.
If you can see audion on the PCB as below,It is constant current led module.
If you can see only resistance on the PCBA,It’s constant voltage led module.
How i will choose suitable led module for me?which one is better?LH Lights tests them as below:
First,I use DC12V test constant current and constant voltage led module at the same time
the temperature and time drawing is at here:
you can see the constant current curve is stable.It means the led temperature is stable,so it can increase led life time.
I also use DC24V to test them at the same time
And It’s easy for you to understand them better when you see this video as below:
So it’s easy for you to know what is difference,if your output voltage is stable,your led module will be better,but usually,the voltage isn’t stable.
The best way,you need to choose constant current for your project.