There are two lighting systems in the observatory, white and red. Both are based on LED strip lights from HITLIGHTS which are available on Amazon. These lights come in a roll which you can cut to length as long as you cut them in the right places. Once cut you can use connectors to hook them up.
I mounted the strips in aluminum angle trim pieces. Two white strips are mounted high and point up towards the roof.
This gives adequate light when you need to do some work in the observatory.
The red strips are mounted lower to the floor and point down. There are four of these strips, one on each wall.
The red lights are on a dimmer, so they can be adjusted or turned off. The appropriate dimmer switch is linked above.
Lights are controlled from switches on the same panel as the fuse box.
The three switch panel is a standard 12 volt RV switch panel. I removed the dimmer from the case it comes in and mounted it directly to the panel. The lights and the dimmer all come with male/female plugs, but I ended up cutting those off and connecting the wires directly and then sealing them with heat shrink tubing. This gives you a nice neat finish.