About 50 watts. I downsized a few years ago, got rid of the unnecessary larger servers, moved to Intel nucs and a 4 disk nas for centralized storage. Was no need to run large servers at home, I play with them at work.
I run proxmox on the nucs with my servers in vms, each nuc has 16gb of ram and performance is fine
Never really shit my mini pcs down, sometimes I restart a proxmox node if I want it to use an updated kernal but that’s it. I don’t run large servers at home
Enjoy. I would say with a home lab, try and plan things, what is it you want to host, what is the best hosting platform, vm, lxc, physical install etc etc. I say this because it should help stop the ‘splatter’ effect somewhat where you end up with all sorts of systems and installs all over the place. So I treat mine a bit like a work environment . Oh,.and don’t forget backups !
I run all my nerves on Debian and also a WD Nas. But, I did once run a windows 10 desktop for a few years and used it as a file server with zero issue. 24/7 access wasn’t needed so any reboots in the night we’re fine. I wouldn’t do it again, I only did it because I had the desktop with lots of drives in and I was too lazy to reinstall it lol But if I was to do it again I’d reinstall it and use truenas or Openmedia vault