This year's series has a yellow hue of lighting that is tiring if you have it at a close distance. It is noticeably different from the white warm light of the exact same product from previous years and does NOT match with them if you have already purchased the product from last year and just want to supplement! It does NOT ACCEPT EXTENSION with a 6-meter series due to the different voltage of the power supply (36V)! Indeed, I connected the 6-meter series (288 LEDs) to the 10-meter series (500 LEDs) and it does not light up.

Update: Intermediate sections of the series have stopped working. Not even an electrician can repair them! Many LEDs had completely oxidized after just 1 period of use. And I had purchased 7 series... Greetings!

If it happens (which will happen) to you that an intermediate section does not work, DO NOT throw away the entire series.
1. Locate at the ends of the said section the point where the main wiring (the one that runs horizontally) consists of 3 wires (the rest of the section has 4).
2. Of these three wires, 2 run from one end of the entire series to the other. The 3rd goes into the bulb of the section that does not work. Cut this one from both sides of the section that does not work.
3. The section that does not work is now free from wires, but it is passed over the other 2 wires with small zip ties. Cut them.
4. The section that does not work is now completely free. Throw it away.
5. Expose the copper from the wires that remain cut on the main series and connect them together. Now you have a functional series of shorter length.

On the other hand, if you have another useless series, you can replenish them from there to maintain the same length. Only these 2 wires are what provide voltage and will light up without you having to deal with the other two wires at all.

Although there is no risk of electric shock because the power supply transforms to a harmless voltage, nevertheless, disconnect it from the power before doing anything.