I never implied that they were. The problem is that there really isn't a better thread(s) on the interwebs than this one on this site. So kudos to you guys. The topic was what color lights... And in some context the lights are used to identify an emergency or hazard during a MVA, for example.
According to the California Vehicle Code:
25251.5. (a) Any motor vehicle may also be equipped with a system
in which an amber light is center mounted on the rear of a vehicle to
communicate a component of deceleration of the vehicle, and which
light pulses in a controlled fashion at a rate...