I mounted an aluminium heat sink but it looks doesn't work, are u sure that the led don't require a resistor if it work at 12V?

Hopefully you used heat sink compound between heat sink and LED,
or one of the thermal pads available to sub for the compound. That
dramatically affects transfer of heat from LED package into the heat
sink.

To control current you can add additional resistance in series with LED,
or use a PWM approach which would allow you also to implement dimming.

Banggood also has pwm dimmers.


Regards, Dana.

 

Hello,

There is enough information for making a circuit.
When you connect the leds in series and drive them with an 1A boost driver like the LM3421, the circuit will be complete.

Bertus

Thank you so much and thank all of you for paying attention to my request, i will try it.

 

Add either a ...
a) 1.1 Ohm 2 Watt Resistor or
b) 1.5 Ohm 3 Watt Resistor or
c) 2.0 Ohm 5 Watt Resistor
in SERIES with one of the 10 Watt LED.
And then verify that it limits the current to 900 milliamps, or whatever is required, by your (yellow) LED.

You can also use a 900 ma Constant Current Source LED Driver WITHOUT any Current Limiting Resistor
You connect the 10 Watt (yellow) LED's in Series and then to this CC Power Supply ...
https://www.amazon.com/d/Low-Voltag...ighting-Transformer-Aluminium/B01MR98KCE?th=1