This Signal model is unfinished. (=edited, pleased read the reply to this post, where I flesh out out the problem!) Note the 2 missing lamps (edit=and the little white lamp too) in the lower left of the pre signal part. This particular Signal Model you have placed in a number of places throughout the route. - When approaching this signal it is very obvious that there are missing lamps, because you see the "glow" from the lamp that is supposed to be there, but no light from the lamp itself, because you didn't build it in (!) (In the screenshot though the pre-signal part is not lit, but you can see that the bottom left lamps (and white lamp) are clearly not there.) Please Dovetail. While the signal might technically be working, it looks sloppy and breaks the immersion, for me. The screenshot is taken from "Gau-Algesheim" station, standing at a side track close to the platforms.
I just noticed that the above mentioned problem is likely only a problem in 'daytime'. In 'daytime', some pre-signals are missing the bottom left 2 lamps, (but does have the "glow" emitting from the missing lamps). At night the missing lamps are suddenly back. Sounds weird, but look, at the following screenshots of a single pre-signal at Rhens station: The following images, of the same pre-signal are from 05.55, 10.03, 15.00, and 20.00
