If you use a lot of LED lighting on your GL1800 the floor board LED Light Kit from Show Chrome can offer a very nice touch. I also consider it safety lighting since it will help drivers along side of you notice that your are there at night. But a lot of people have questions about how to route the wiring from the LED lights so that they aren't simply hanging there looking tacky.
sdlyon5 living in North Bend, WA shared his solution with the internet community at the
GL1800 Riders forum. Since posts on that forum are numerous and hard to sort through I have asked his permission to post his solution here with pictures he sent me. The GL1800 forums are incredible resources for finding tricks such as these! Thanks sdlyon!