A rated pwm controller will work for what I think you'd like to do. For instance anything that is rate at 10amps an has an acceptable range if adjustability will suffice. I bought a few different under 10$ led pwm controllers off Amazon to do some testing. Ill post a few links when I get back to my computer in the morning.
Rally Moto Kit /// Vendor Thread
Originally Posted by Dread Pendragon
Mention to HogWild which way the wind is blowing where you're at, wait 20 minutes, and he'll post a picture of the intersection your at and a Google Earth route of how to get there.