The rear end device on the tail of a westbound train lights up as the sun sets over Angell in Northern Arizona on the Seligman Sub. We got an eastbound 3 minutes after the sun dipped below the horizon.
A growing album of photos that IMHO reveal the awesome and seldom seen beauty of railroads in the dimming of day to dawn's early light! From dusk to dawn, lights are on! (I still find new "Lights In The Night"!)