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### How many watts does a led lamp take?

How many watts does a led lamp take?
Different LED strips are different, and need to be calculated according to their current and voltage to calculate the power.
Power is a measure of the rate of transmission of energy. In a DC circuit it is the product of voltage V and current A; it is much more complicated in an AC system. Whether it is high-voltage or low-voltage LED strips, they all convert AC to DC to work.
Therefore, the LED lamp with power calculation can be used:
P=UI
Led lamp with power calculation method:
White light (example of single lamp bead)
LED operating voltage (U): 1.8V-3.6V (mainly determined by the chip, the color is different from the operating voltage)
Rated current (I): [one wick 10mA-20mA]
Power (P): P = UI ie power: 3V * 20mA = 3V * 0.02A = 0.06W (1A = 1000mA)
One lamp bead is 0.18 watts. Then, one meter has 60 beads|72 beads|90 beads, which is multiplied by the corresponding number of meters. For example, if you bought a 20-meter led LED strip with 20 meters, that power
P=0.18*60*20=216 watts
Because each manufacturer's chip is different, it will cause the working voltage and working current of the LED lamp bead to be different. Therefore, the same one meter of LED strips on the market, their power will be different.
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