Small study suggests dark mode doesn’t save much power for very human reasons
If you know how OLED displays work, you know about one of their greatest strengths: Individual pixels can be shut off, offering deeper blacks and power savings. Dark modes, now available on most operating systems, aim to save power by making most backgrounds very dark or black, while also gratifying those who just prefer the look.
But what about on the older but still dominant screen technology, LCDs? The BBC is out with a small, interesting study comparing the light and dark modes of one of its website pages on an older laptop. Faced with a dark mode version, most people turned up the brightness a notable amount, sometimes drawing more power than on light mode.
It's not a surprise that dark modes don't do anything to reduce LCD power draw. However, the study—not peer-reviewed but published as part of the International Workshop on Low Carbon Computing—suggests that claims about dark mode's efficiency may be overstated in real-world scenarios, with non-cutting-edge hardware and humans at the controls.
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