check out ebay.. I got 6, 60watt stobes for around 100 bucks. They are pretty easy to install. Just run through the firewall for your switch, get some power from your battery and get a 1" drill circle thing with teeth & guided bit (sry don't know the correct name of tool).run your strobe wires to your strobes, put some all weather elec grease in the connections, and your done.
You can get them in what ever color you want.. I don't remeber what the laws were when I was running my clear strobes for constuction but then again I had the hazards going to for the the amber color... In atlanta I didn't care what color they were, I just needed something bright light to slow down the idiots up there!! Of course I didn't run red or blue... that is asking for a ticket.
I also picked up a two strobe dash kit for 40 bucks off of ebay that plugs into the cig outlet.. That one was really easy to install!
Note- If your power supply box is not weather proof install it some where that the weather won't get to it... FYI friend lost some money on that trip haha