I have two front lights, one blinking, one steady. Both on the handle bars. Since I ride a lot in urban traffic, with a lot of light from store fronts and street lamps, I found that a bright light is necessary to break through the light pollution.

What I have recently started is, pointing the steady light at me (and my reflective jacket). So far, I have gotten positive feed back. It changes how traffic sees me, not just two bright lights coming at you, but a clearly visible guy on a bike with a bright, reflective jacket.