Northern Pacific & Southern Pacific

[mrdtrains]

I have some Stewart/Kato F3 Phase I Locos in the Northern Pacific road name and some Phase II in the Southern Pacific road name. All locos have two headlights - one on top of the other. For these road names can anyone tell me if they made use of a mars light? If so, was the mars light on top or on the bottom? I want to install a DCC decoder and make use of a mars light if this was appropriate for these railroads.

Thanks,
Michael Dove
Grand Junction, CO

[pray59]

I have tons of NP F unit photos. Most have the headlights below (2 side by side in the lower lens housing), and the class lights above. (1 red and 1 white in an above/below orientation in the same lens housing with red at the bottom)
:D

[mrdtrains]

It sounds like what you are describing as far as the upper lens is that this is the lighting configuration for a passenger train (red light). Since my locos are for freight would there just be two lights in the upper lens, and would they be in a top/bottom configuration?