When you order a Tri Cree crib US with a QD the LED wire come pre-wired in the LED module with heat sink. It will also come with the other end of the QD wiring to add to the wires coming from the battery.
Depending on the color and the battery wattage will depend on what resistors you need. They can be added to the positive side or negative side wires. Here is a calculator to figure out which resistor
https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-led-series-resistorThe US website does not post the voltage of the LEDs. Go to TCSS Tri Cree parts section
http://www.ultrasabers.com/Tri-Cree-XP-E2-C138.aspx look at the come you want and it has an the info you need for LED voltage and mA. You will need this info for the calculator.
All of this may sound confusing but it is pretty simple once you figure it out (using the calculator). You can get resistors at TCSS or Amazon etc..
Good luck and search any of this on YouTube if you need help.
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