Why constant current is required?
Lighting Emitting Diodes need to work in strict working conditions. This is determined by their properties. LED Lights are vulnerable to temperature change. LED voltage will be changed along with temperature, consequently leading to the change of LED current. As we all know, each LED has a particular working current. Long-term working in a current larger than the working current will cause damages to LEDs, even destroy them. Here constant current means LED current will remain a constant value when external conditions change, like the increase of temperature and LED voltage. However, maintaining a constant current is not an easy job.
How LED power suppliers match with LED light broad?
Some customers prefer to buy LED light broads at first, then look for power suppliers. It is very hard for them to find suitable suppliers (either with an excessive current and an insufficient voltage, like I>350mA,V<40V or with an insufficient current and an excessive voltage, like I<40mA,V>180V). This mismatching between LED High Bay Light broads and LED power suppliers will cause excessive working temperatures, low light efficiencies, or insufficient input voltages. The best way is to choose LED components from one LED manufacturer. Generally, LED light broads and LED power suppliers from one manufacturer are well matched. LED chips will be installed onto the light broad in a most suitable way that makes their designed suppliers play the best performance. If customers insist to use their own light broads, the best way is to let LED manufacturers design the particular power suppliers for them.
What is the suitable working current for LED?
Theoretically, LED working current is 20mA. Some manufactures set their LED current (the current pass though LEDs during their work) as 20mA, leaving no margin. It is improper to do so. In fact, LEDs will generate a large amount of heat under a current of 20mA. Even if we can keep the entire circuit to provide a constant current, it still can cause damages on LEDs, reducing their working lives. After many tests and comparisons, technicians have proved that the best working current for LED is 17mA.
What is the most suitable voltage for LED Grow Lights?
Normally, LED working voltage is around 3.0V-3.5V, most of them are 3.125V.