As an engineer looking at screens all day, I find Dark mode to be easier on the eye. it also has a very modern look, it's why I use it for my project: Lunch Flow (https://www.lunchflow.app)
Each have their own place, light mode is needed whenever the surrounding environment is a bit dark and you need that little boost of brightness you get your work going.
However, in terms of comfort for the eyes, dark mode is still better because you're not getting blasted by white light constantly
I like dark mode best, I wish Product Hunt had dark mode! Maybe it does and I can't find it. I usually search for it because as many mention, it is easier on the eyes for me.
It depends on user preferences, use case, and context of usage. Dark mode works great in low light, saves battery, and looks sleek, while light mode is easier to read in bright spaces. Let users pick or switch automatically for the best experience ;)