Regarding the Ancient Wall Light, if you wanted to add them to this mod:
The defs for that are located under RimWorld\Data\Odyssey\Defs\ThingDefs_Buildings\Buildings_Natural.xml

Expanding on what you've provided, I commissioned someone to build out a few extra bits and bobs, including allowing the Ancient Wall Lights to be collected, and then a fun little way to make the Ancient Lamps into wall lamps. I hope you don't mind, but I credited you for being what inspired the work I had done.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3536856332

i saw an ancient wall light, any chance of adding that to this mod?

Confirmed working in 1.6 with no changes required, if people want to use this mod as is or if the author wanted to tag is as 1.6 compliant.

Thank you for putting this one out there. Makes the early game stuff much more enjoyable.