Bicycling

Counterpoint: blinking lights are in fact installed on airplanes both large and small. Red beacon lights blink, and so do high intensity white strobe lights. The variation helps identify the source of lights against a busy city skyline at night (that must be an aircraft we're looking at) and serves to call attention against a sea of steady lights in the background. It's very easy for the airplane to blend in otherwise. Even some racecars pulse their brakelights automatically to draw the attention of fellow racers. Finally, as a driver in sometimes poorly lit areas compounded with a rather avid local bicycling culture, I have found that bicycles equipped with rear-facing red blinking LEDs really help distinguish the bike against the background. The best setups had a light on the back of their helmets as well, which does the most to aid depth perception.