Guide to LED street lights in two parts. This is an interesting article that explains a lot about Installing LED street lights and the costs involved with it.
Part 1
LED street lighting Part 1
www.myledlightingguide.com/article.aspx?articleid=36
Part 2
LED street lighting Part 2
For the Complete article with lots of info on LEDs and lighting. you can click on here to get to the main page.