After spending a lot of time and money installing adequate lighting in the layout room, and then a lot more time and money on trains, buildings and scenery, night operations are no longer allowed.
(Although I often feel like I'm in the dark about something or other.
)
At one time, I did install lights in some structures, but I found that operations in a darkened room were not much fun. Nowadays, I
remove the lights from most of my locos, and replace them with additional weight for improved pulling power. While lighting can look effective, especially in a photograph, the first time that a headlight flickers or a passenger car's lights dim as the train crosses a turnout pretty much spoils it for me. I
do appreciate the effort that others put into lighting effects, but it's not something that
I want to spend time on.
Wayne