Bodhi mentioned in January 2021 article

Interesting article - I realize the author does not rank them but and they are all "light" but there are a few differences. I have tried them all looking for a light distro for older systems with limited CPU and RAM. Lubuntu, Xubuntu, Linux Lite, Puppy and Bodhi are Ubuntu based. The big difference I found is that Bodhi, Standard anyway, is significantly lighter. All of them except Bodhi Standard are bloated with too many apps. The other big difference is Bodhi has a much lighter desktop/windows manager in Moksha/Enlightenment.

Tiny Core is definitely light - extremely light as a matter of fact but really not easy to work with and not an OS I would recommend for someone new to linux. For a really old under powered rig it could be a good choice with just a few basic apps. And antiX linux is light enough and not a bad distro and Debian based so there is the repository limits that entails. And like it's Ubuntu based brothers with the exception of Bodhi is loaded down with a bunch of apps that a lot of users will never use or want.