If you are writing about the small lamps on both sides of the boiler front; THEY ARE NOT "MARKER LAMPS".
Marker lamps are on the rear of the whole train.
What you are supposedly speaking of are "CLASSIFICATION LAMPS"
They would have the option of being;
WHITE lense, to indicate that the loco is leading an EXTRA TRAIN, not on the timetable.
GREEN lense, to indicate that there is a second section of that train, following.
RED lense, to be used when the front of the locomotive is in fact the rear of the train (Not used often, but was sometimes used when a locomotive was running in reverse)
So, in order to make your "Class" lights authentic; you should be able to change then from red, to green, to white, or not have them on at all.
Best to not light them at all, and in most cases you would be more correct.
"MARKER LIGHTS" are the lights on the rear of the last car on the rear of the train. They usually showed RED to the rear, green showing forward, and to the sides. Some railroads used YELLOW to the sides and showing towards the front.......
It was considered that a locomotive, or a locomotive with cars, was NOT a "TRAIN", without "MARKERS" bringing up the rear. A locomotive, running without cars, would be considered a "TRAIN" if it had MARKERS on it's rear.
Today; on the modern railroads; seldom are Class lights used, and on the rear we see a "Fred" (Flashing rear end detector), which monitors brakline pressure, and on most pikes has a battery operated, flashing amber light.
Of course these rules were different within the "Yard Limits" in most cases.
Fr.Fred
Marker lamps are on the rear of the whole train.
What you are supposedly speaking of are "CLASSIFICATION LAMPS"
They would have the option of being;
WHITE lense, to indicate that the loco is leading an EXTRA TRAIN, not on the timetable.
GREEN lense, to indicate that there is a second section of that train, following.
RED lense, to be used when the front of the locomotive is in fact the rear of the train (Not used often, but was sometimes used when a locomotive was running in reverse)
So, in order to make your "Class" lights authentic; you should be able to change then from red, to green, to white, or not have them on at all.
Best to not light them at all, and in most cases you would be more correct.
"MARKER LIGHTS" are the lights on the rear of the last car on the rear of the train. They usually showed RED to the rear, green showing forward, and to the sides. Some railroads used YELLOW to the sides and showing towards the front.......
It was considered that a locomotive, or a locomotive with cars, was NOT a "TRAIN", without "MARKERS" bringing up the rear. A locomotive, running without cars, would be considered a "TRAIN" if it had MARKERS on it's rear.
Today; on the modern railroads; seldom are Class lights used, and on the rear we see a "Fred" (Flashing rear end detector), which monitors brakline pressure, and on most pikes has a battery operated, flashing amber light.
Of course these rules were different within the "Yard Limits" in most cases.
Fr.Fred