Lights at night, lights during the day. Bright lights. Many lights, flashing lights. Clearly, the incredible disparity between American accident and death rates vs other First World countries shows, that despite the American obsession with lights, hi-viz and helmets, all of this diligence is irrelevant in the face of a driving public unsympathetic towards the performance and vulnerability disparity between even the smallest automobile and a bicycle. So... rock the lights, but don't for a minute be fooled into thinking they mean anything. What they do, is establish a baseline of credibility for your claims should anything untoward occur. And that baseline can be established with just one rear tailight and one forward light. Either or both may flash. I mean.. come on... if you are out there at night then you already know how much more visible just one flashing tailight is vs nothing at all. Do you really think three will be better? There is absolutely no need to rock $500 of assorted light equipment. It won't make you safer than $20 of assorted light equipment. Ride defensively. That is the best strategy given the road culture prevailing in the United States.