Road & Track rants about why red signals are inferior to amber ones:
http://www.roadandtrack.com/car-cult...a-marty-mcfly/
"Amber rear turn signals are the most un-ambiguous way for a car to let its driver indicate his or her intentions. They're a completely different color from the taillight, lit by a completely different lighting element, on a completely different circuit. There's no way a person with open eyes and a few semi-attentive brain cells could misconstrue a blinking yellow light on the back of a car, truck, van, or ride-on lawnmower as anything other than an indication of a plan to change directions in the near future."
....
...Worse still, a bunch of them will use the same lightbulb, or LED array, for all three functions: Taillight, brake light, and turn signal. At a split-second glance, an amber turn signal immediately registers its intent in your mind.
The F15 X5 falls into this category of unicolored LED strips -at least the US versions.