Since the subject of "amber lights being used for rear" came up I've been on the look-out so to speak. As per my last post; I've noticed amber lights being used for rear conspicuousness before but truthfully I really never paid it much mind. Since I drive for a living and spend a lot of time on the road at sunset and night I have a lot of opportunity to see just what is out there. In the past week I've noticed more "amber for rear" usage than even I expected. On one occasion I came up on a police car that seemed to have a very large "amber" center area going on the roof light bar while they were stopped. Very bright it was too. I'm just going to assume that the light bar had "multiple LED colors"....then I saw a work truck on the side of the road with smaller amber and white LED's flashing. The final icing on the cake was I was driving through Langley Park, Md. when I spotted what I thought at the time was a tow truck with very bright amber rear lights..Turned out I was wrong. Seems the local Metro service has decided to install some very bright Amber panels ( ~2-3ft long ) on back of their buses. All I could think at the time was, "Yep, no one gonna hit that bus", ( unless they're totally blind ). ...Oh the times they are a-changing.