How to calculate the power requirement of LED lights in order to select a power supply?
Calculating the total power requirements of LED light is an important step when selecting a suitable LED power supply. Here’s a basic method for calculating total power requirements:
Determine the Power of a Single LED
First, determine the power of each LED. Typically, the power of a single LED is between 0.02 watts and 0.08 watts, depending on the type and specifications of the LED. For example, if an LED has a power of 0.06 watts, you can use this value for subsequent calculations.
Calculate the Number of LEDs
Next, determine the number of LEDs you will use. For example, if you have 40 LEDs, this number will be used to calculate the total power.
Calculate the Total Power
Calculate the total power using the following formula:
Total Power = Power of a Single LED x Number of LEDs
For example, if each LED has a power of 0.06 watts and you have 40 LEDs, the total power is: Total Power = 0.06 x 40 = 2.4 W
Consider Additional Power Margin
To ensure stable operation of the power supply, it is recommended to add a 20% margin to the calculated total power. This can be achieved by multiplying the total power by 1.2. For example, if the calculated total power is 2.4 watts, then the required power supply wattage is:
Required power supply wattage = 2.4 x 1.2 = 2.88, Therefore, choosing a power supply with at least 3 watts would be appropriate.
Ensure the power supply output voltage matches
Finally, ensure that the output voltage of the selected power supply matches the rated voltage of the LED light fixture. Common LED light fixtures use 12V or 24V power supplies; incorrect voltage may damage the LEDs or cause them to malfunction.
By following the steps above, you can accurately calculate the total power requirements of LED light fixture, thereby selecting a suitable power supply to ensure the normal operation and long lifespan of your LED light fixture.
