# How to calculate the power of LED light strips

*2024-10-14 13:12:51*

2. Calculation method of light strip power

1. Calculation of light strip length

First, you need to calculate the length of the light strip. Usually the length of the light strip is in meters. Assuming that you need to use a 10-meter light strip, the calculation method is as follows:

Length of light strip = length of area to be illuminated + loop length.

Loop length usually refers to the length of the light strip line, that is, the length of the line between LED lamp beads. Generally, the loop length is about 10-20% of the length of the light strip.

For example, if a study room that is 10 meters long needs to be illuminated, the loop length can be set to 2 meters, so the length of the light strip is 12 meters.

2. Power per meter calculation

Power per meter refers to the power value required per meter of length of the light strip. Typically the wattage per meter is known and can be checked when purchasing the light strip, but if it is not provided it can be calculated yourself.

The calculation formula of power per meter is: power = voltage * current * power factor. Assuming the voltage is 12V, the current is 2A, and the power factor is 0.9, then the power per meter is 12*2*0.9=21.6W.

3. Total power calculation

Finally, you need to calculate the total power of the light strip. This value is usually used as a reference when purchasing. The total power calculation formula is: total power = length of light strip * power per meter. Assume that the length of the light strip is 12 meters and the power per meter is 21.6W, then the total power is 259.2W.

3. Precautions

When calculating the power of light strips, you need to pay attention to the following points:

1. The power of the light strip is calculated in units of one meter, so you need to know the length of the light strip.

2. The power per meter can be calculated by referring to the specifications of the light strip or by yourself.

3. The total power is calculated by taking into account factors such as the length of the light strip and the power per meter.

4. When purchasing a light strip, you need to pay attention to whether the power of the light strip meets your needs and whether additional equipment such as an adapter is required.

In short, when choosing a light strip, you need to calculate the required length, power and other factors based on actual needs to avoid waste and unnecessary expenses.