I will give as much information as I can, but my knowledge is limited.
There is a staircase with a 2 way switch. There are 10 LED lights throughout the stairs. They are using direct current.
The old LEDs were taken out and now I have 10 holes with 2 wires each. I GUESS one wire is positive (+) and the other is negative (-).
When I connect ALL of my new LEDs, each postivie to the positive wire in the wall and each negative to the negative wire in the wall, all of them light up extremely low.
After that, I tried to connect them one by one to see what happens.
To do so, I connected all the wires from the wall with each other (1st hole's 2 wires were connected together, 2nd hole's 2 wires were connected together, etc) and in one hole only, I connected my LED (tried the wires to see where it lit up, knowing this way, the positive and negative). The light that came out was bright and as it should be.
So next, I left everything as is, and connected one more LED to another hole. Once I did that, the light was again extremely low as it was when I connected all of them.
Any ideas of what is happening or what I am doing wrong?
The new LEDs are from an LED strip that was cut, and 2 wires were solder, one on the positive and one on the negative.
I am adding a schematic, have in mind I have nothing to do with electrical engineering. Just trying to make it easier to understand what I am talking about.
For further details, if you need something I can check that have not said above, please ask me.