Along the lines of what dwainedibbly just said, with the TL-LD1000 I've had co-workers tell me they could see me from over a mile away.

I've had on-coming cars pull off the road and stop until I got close enough they could see what I was, on a narrow, 2 lane, rural highway. Rare, but it's happened more than once.

I've also had approaching cars from the rear slow until they could tell what I was before passing, but part of that could have been the light arrangement. Sometimes there are farm tractors on these roads.