I've had the capability of three taillights since day one, and usually run a single taillight during the day, all three at night. I've recently added some new illumination and this video is a brief walk-around of the vehicle just after sunset. The camera is rather IR sensitive and the LEDs put out a pretty good amount of IR, so they appear brighter on the camera than real life might indicate. In real life, they are still quite bright and visible for about two miles.
Not recognizable from two miles, though, unless you've seen UFOs before!