The top ones are service drive tail lights and work like regular car tail lights; i.e. low red when your lights are on and bright red when you apply brakes. They only work when the headlights are turned on.
The bottom strips are blackout drive markers. A series of white lights are behind the strip. If you can see the individual little ticks of light, you're too close (while following in a convoy). If the ticks of lights look like one light per side, you're too far away. If you can see two distinct lights on each tail light side, then you are at the proper interval from the vehicle in front of you.
