I recently purchased a Roomettes kit so I could add some interiors to a couple of structures on my N scale project layout. The kits are easy to assemble from card stock cutouts and include a Just Plug compatible light for each room in the kit. While the rooms included in the kit are designed to fit specific Woodland Scenics/DPM building kits, they can be used in a variety of other structures. The two structures I used the kits in didn't have exact fitting rooms, so I had to alter/combine them to work. But, since it is a card stock kit, modifications are quick and easy.
Watch the video below to see how I used the Roomettes kits. They are a great value, especially considering you receive 14 Just Plug compatible lights with the kit.
I look at Roomettes cardstock interiors for your structures. Head to https://roometteslighting.com to pick up one of the kits.