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Discussion on: Why “dark mode” is more energy-efficient: How to calculate image energy-cost

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shadowfaxrodeo profile image
Nathaniel • Edited

This is great.

I think this is also true for CRT screens, maybe more so. Obviously as people say there's other more impactful ways to save energy. But the great thing about this is that people mostly prefer dark mode, it saves battery, and is easier on the eyes. So, even if the environmental part turns out to be a dud, it's still a win.

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darkain profile image
Vincent Milum Jr

This actually doesn't apply to CRTs. The vast majority of energy consumption in a CRT is due to the movement of the imaging beam, not the beam projection itself.

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shadowfaxrodeo profile image
Nathaniel • Edited

I got that info from scientific america, not to say weather it's true or not:

CRT monitors, which until a few years ago were the predominant models among PC users, consume more power when a computer screen is white. To confirm this, Schindler measured the energy output of an 18-inch (45.7-centimeter) CRT monitor and found it used 102 watts when the screen was white but only 79 watts when the display was black.

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madsstoumann profile image
Mads Stoumann Author

Interesting article! Thanks for sharing. However, I assume nobody use CRT-screens anymore?

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shadowfaxrodeo profile image
Nathaniel • Edited

Earlier this year I forgot my laptop charger and ended up on an IBM thinkpad running windows XP, which lead me to doing a bit of research on this sort of thing.

People still use Internet Explorer 6. 0.01% of people, but that still is around 1 million people. I'm sure there must be some internet cafes and hostels using old computer monitors.

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madsstoumann profile image
Mads Stoumann Author

You’re probably right!

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madsstoumann profile image
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