RGB LED dmx-rgb50d-5w

I see where to connect the 12V DC+
But what about the other wires?
It's not documented on here
Tnx for helping.

Yes it is quite clearly documented on that page you linked. They go to the connector on the end of the controller board.

Sorry, my Q was not complete. I bought only the LED.
I want to work without controller, and use Arduino as a controller, with external 12V.
So what voltages to put on R, G, B and V- ?

So what voltages to put on R, G, B and V- ?

well V- goes to the negative output of the power supply where you got your +12V from.

My guess as there is only one LED is that the other three wires go to ground. That is the negative output of the power supply. That should light it up fully.

Sorry, my Q was not complete.

Is it complete yet?
Or:-
If you want to control them with an Arduino you will have to connect them to a transistor or an FET that is switched by an Arduino PWM output.

Great, looks logical, I'll let you know if it works.
No more Q's, for the time being...