DarrylH wrote:Also, lights on top of a helmet may be too high to be seen in a rear view mirror at that range. Cars have rules for light height - is there any rule for bikes?
They can be seen fine, however whether the driver can interpret them correctly I'm open on - and its probably a reason that despite having 2 bikes, I have my lights on my bars. Note that with bright headlights on the bars, I've had the same thing happen, and I've been a passenger in a car when the same thing has happened, and I've been riding a motorcycle behind a car that did the same thing in broad daylight into the rear wheels of a bus (with obviously most of the bus visible ahead of their car), which was shortly followed by the car stopping, the passenger getting out and vomiting from fright.
All that usually happens is the bicycle saves the idiot from contact by being narrower.