LED lamp with LED constant current is 20mA, therefore, the power supply current must ensure that cannot be greater than the constant current. Many friends in use only pay attention to voltage, while ignoring the current specifications, such as power often leads to excessive current and LED breakdown, causing damage to LED lamp belt.

Power generally have a rated voltage, rated current and rated power. We in the selection of the power supply when, must consider load ( LED lamp belt ) power and what is the rated current, so easy to choose the right power.

Generally speaking, SMD 5050-150 LEDs lamp with power is 7.2W per meter per meter, i.e. constant current is 0.6A; 0603 LED lamp with power is 1.5W per meter per meter, i.e. constant current is 0.125A.

Understanding of the LED lamp with each meter constant current, can accurately grasp the power output current problems, avoid because of excessive output current caused by LED breakdown phenomenon.

Special reminder: LED lamp with power use must pay attention to voltage, current, power of these three factors, are indispensable!

the problem you might also want to know：
Strip lighting question and quote?
How to select high quality of led strip lights?