right, using the bulbs that were in your USDM headlights, right? I know that there's two ways to do it, check this link out,

Toronto Prelude Club JDM Headlight Installation


because I wasn't sure if I needed to remove my bumper, so I was looking for an install walkthrough, then I stumbled across step 12, which discusses the use of H1 and H4 bulbs, and how (I'm assuming) since they're either higher or lower in voltage, you'll need the JDM harness. I suppose if I can't find a harness, I'll just use my old bulbs, I just wanted to see how the light configuration would end up using the H1s and H4s.