sup man, usually, those halogen bulbs do not help much, at all. Dual Halo Headlights? those Angel Eyes type, I supposed right? ok, my best recommendation is go for the HID Kit, that's the only way to help with your after-market headlights projector. Bohmen HID is pretty pricy, you can get Vision HID ...
http://www.itsrealstuff.com/index.html <<< you can get the Vision HID Kit from here ... good price. They even have the 8000K HID Kit for only: $425.00, I have the Bohmen HID Kit, 7500K for $530.00, see? big difference in pricing eh? like I said, Bohmen and Vision both made in Germany; but Vision HID saves you some moneys. As far as the fuse may go, not a goot idea, channging from 20A to 15A ??? you're degraded it hommie, you supposedly upgraded it. After I installed the HID for my 1996 Honda Accord, I upgraded the 20A fuses to 30A fuses; because that's what it said in the booklet. If you still using the 15A fuses, they will blow up, trust me. Okay, I'm hoping I am making some senses, hehe, later !!!