alternator and headlight upgrade
http://www.madelectrical.com/electricaltech/brighter-headlights.shtml
This will explain the relay upgrade.
The Silverstars are a replacement headlamp that is readily available at autoparts stores. The color temperature is closer to "daylight" temp, which appears brighter. In actuality, it is just easier to see because of the temp (more white, less yellow....NOT blue).