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How to connect the LED christmas light string to the power supply

With the development of society, more and more places use led lights, and some places need to be decorated with led light strings. At night, when night falls, most of the lights in the city are LED lights, and there are even neon flashes. It is also the LED christmas light string that plays its role. So how to connect the LED light string to the power supply?
First, the power connection method of the LED christmas light string

The general voltage of the LED light string is DC 12V, so it needs to use a switching power supply to supply power. The size of the power supply is determined according to the power and connection length of the LED light string. If you don't want each LED light string to be controlled by a power supply, you can buy a switching power supply with a relatively high power as the total power supply, and then connect all the LED light string input power supplies in parallel (if the wire size is not enough, you can extend it). Unified by the main switching power supply. The advantage of this is that it can be controlled centrally. The inconvenience is that the lighting effect and switch control of a single LED light string cannot be realized. The specific method can be measured by yourself. The LED light strings I use from Zhongshan Greenman are all connected in parallel with the total power supply.
Second, how to choose led lights

1. Look at the packaging and trademarks
A qualified and regular christmas LED lamp will be marked with the following contents on its outer packaging: rated voltage, voltage range, rated power, and rated frequency. Generally speaking, the trademarks of high-quality products have good printing quality, clear fonts, and are not easy to fall off. When wiped with a soft damp cloth, the marks are clear and recognizable, not easy to wipe off, and have the manufacturer's trademark and related certification marks. Fake and shoddy products have poor printing quality, fuzzy fonts, easy to erase, and no manufacturer's trademark and related certification marks.

2. Look at the appearance of the christmas LED lamp
The real LED energy-saving lamps use three primary color tubes, the tube is white, and it is more white when you cover it with your hands. In addition, from the perspective of the lamp tube, you can compare multiple lamps together. The lamps with better shape and size consistency are mostly machine bending and forming, and are mass-produced products. The consistency of the product is good, the quality is easier to be guaranteed, and the interchangeability during maintenance is better. Of course, there should be no cracks, looseness and signs of prying between the interfaces. In the process of installation and disassembly, the lamp head should not be loose or tilted.\

The plastic shell of the lamp must be the kind of engineering plastic flame retardant. Ordinary plastics are easily deformed and flammable, and are prohibited from being used in the production of energy-saving lamps. From the surface, the two can be easily distinguished. The latter has a smooth and shiny surface, and the former has a texture similar to frosted glass.
3. Look at the driver
Generally, the lifespan of LEDs is not as long as 50,000 hours as mentioned by the manufacturer. Now, the cross-current drives certified by the EU on the market can basically reach 20,000 hours. Since LED lighting-level products have only been available for 2 to 3 years, it is impossible to know that they can be used for 5 to 10 years without the drive being broken or light decaying. Generally, major manufacturers will guarantee a two-year warranty.

4. Look at the startup performance
LED energy-saving lamps have two characteristics: one is that the higher the temperature, the easier it is to start; the other is that the lights will not flash when turned off. In addition, it is worth mentioning that many LED energy-saving lamps are very dark when turned on, which is not good for the life of the bulb. LED energy-saving lamps should be equipped with power circuits and PCB boards inside them.

5. Look at the lighting color
Good quality light and color uniformity, no chromatic aberration. For example, warm white is the same color temperature, but poor light color is not uniform. For example, although the 10 lamps are all warm white, they look different, with chromatic aberration, some are yellow, some are light yellow or even red. In addition, a good LED has a high color rendering index. When the light hits the object, the object is still the original color. The poor LED will cause the object to be discolored by a dozen lights. Simple test method: a batch of lights are lit at the same time, and there is no color difference with the naked eye.

6. Look at the temperature at work
Under normal working conditions, the temperature rise of LED energy-saving lamps should be very low. Otherwise, LED energy-saving lamps have a very short lifespan. At the same time, when the energy-saving lamp is lit, there is a fast flashing or very dazzling fluctuation, which indicates that the energy-saving lamp has a quality problem.
7. Look at the interference

In my country, electromagnetic compatibility is already an item that electrical appliances must pass. However, the test of this item is very complicated. When the user buys a lamp, he should check whether there is a mark on the package that has passed the national electromagnetic compatibility test. The second is to bring a medium and short wave radio. When the lamp is working, place the radio nearby, and the lower the noise emitted by the radio station without the medium and short wave, the better the electromagnetic compatibility of the lamp under test.
This article introduces how to connect the LED light string to the power supply, and also introduces the purchase method of the LED light string. If you want to buy a more high-quality and more suitable LED light string, then the seven purchasing skills mentioned in this article are Oh must not know. If you don't know how to connect the LED light string to the power supply, then the connection method in this article must be known.