A decent set would be $175. That would be just a single color for the bike and a rocker switch. The install process is like 45 minutes to a hour. Reall easy. My company order these straight from Germany and Beijing China. These Lights are garunteed For the life of the bike. If the bike still runs.. I will replace the light or lights for free.
I know that in TEXAS it is completely Legal. As long as they do not flash or exposed on the outside of the bike, They are legal. With every kit I sell, I print off the rules and articles to keep with your insurance if you ever get pulled over. For other states I need to look at and see.
I want to say in Texas it's legal or you're not ****ed with as much if you're parked. If you're riding...pretty much asking for it. Where are you located? I'd be interrested in a set...these are bright as shit