Originally Posted by
genec
You need a steady to be seen, and a blinky to catch attention. I go with both. Frankly if you do look like a UFO, all the better.
Actually I do have both. My Mars 4 is on steady, but my barends flash as does the helmet one. I do the same on the front, I have main bar light and a helmet light on steady of course, and an amber flasher. But the point I was making is that if you have just one tail light is to leave that one on steady, it's less confusing for drivers.