Another answer for dual headlights is to put one on blinking mode.

I have dual diNotte headlights on front of my bike. I can set them to "solid" or "pulse" - the pulse mode has them stay on but there is a big pulsing "blink" every 10 seconds or so. No way would someone mistake that for headlights.

BTW, last night on the way home from work, I got the remark from another cyclist about my diNotte tail-light that I have described before: "Oh my god, I saw you from a mile away, what kind of tail light is that?" (As usual, I asked if it had blinded the other rider, and the answer is no...).

Two things to take away from this story:
- diNottes are awesome bright tail lights
- I ride so slow that I am always getting passed by other bikers.

In this case, I was getting passed by a 50+ neighbor on a single speed commuter (on a very hilly route!)