+1 on Garauld's brackets and the Hella lights. These are fairly simple to install and provide plenty of light for normal night riding. I keep mine aimed a littl e wide and high so that I can see deer and other critters along the shoulder.
HIDs provide a lot more light, but are more expensive, more difficult to install, and may not be legal in your state. I pass NY inspection with the Hellas with no questions.