I have had a lot of experience with modulators, over the years. I moved away from SDC controllers,, reluctantly,, because they failed to offer an LED version, with proper 80/20 modulation. Their website says they will finally have one this fall,,, maybe ?? Ultimately,, the Kisan modulator gave me everything I needed,,, although I did a bunch of custom harness work for plug and play installation, with modulation on my high beams. And, Kisan was pricey. I am still not confident that the modulator does not negatively affect the cooling fans life on my F3 led bulbs. The Kisan led setup is very effective. As long as an oncoming driver is looking your way,,, a hesitation by them is produced. Which is what you want. In a very small percentage of oncoming drivers,, other negative reactions will also be produced. It's a big subject,,, and I am currently not modulating my headlights. But,,, I am thinking about returning to it. Cheers,,, CAt'