or

Light Mode?

Which is better?

These articles/ videos may help you decide:

Enable dark System Mode on your device. This enables Dark Mode on the Operating System. This may include major apps and Native Apps.
Enable Dark Mode on your browser. Dark Reader is a great Extension that allows users to enable Dark Mode on every website you access! It works very smoothly. Dark Reader is on Chrome, Firefox, Safari, and Edge for desktop browsers.
Get a Dark Theme on your broswer. Thi step will make the appearance of your Browser UI look different, not the websites you see. Just Black is a good choice for Chrome

I prefer Dark Mode more than anything else!

Source: https://www.androidauthority.com/dark-mode-poll-results-1090716/