Now that you're in the Arduino world, I don't think you need that anymore. I believe the Arduino can produce the PWM signal for you, and you'll just need to add an external transistor to switch the current to the LEDs on and off in response to the PWM signal. Mind you, I've never used an Arduino.So in reference to this reccomended PWM controller
https://www.ebay.com/itm/0-10V-Anal...hash=item283250fbe6:m:mUSSpNlHYs34HroI58YK-HQ
is this the only one that i could use? Could i program the LEDs to dim without it? if that's possibe would it be worth the time spent writing the code? Is there a cheaper dimmer, cause I do need some kind of dimmer, correct? cause I am a little hesitant to spend $28 on something im not positive i need.