Talking about choice. The article is presented in non-avoidable dark mode. Enough already! Say it with me: dark mode does not directly reduces the brightness, which should be your main concern, it only masks the brightness, which is BAD!
Dark mode on an oled reduces brightness (and power consumption).
Dark mode on my work laptop (not oled) reduces backlight brightness. This is auto-tragical, because it seems to only respond to changes in the display buffer's average requested luminance, instead of using an ambient light sensor. Dropping backlight toward minimum when the room is bright makes the screen mostly unreadable. And there's no control for this. Dell should be ashamed!
More importantly, if you place any darkening filter, including a darkened set of pixels, in front of a light source, it reduces the brightness. But perhaps the main concern you intended is "power consumption", not "emitted lux"? If, I'd say "Depends on your application.".
