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Feature
Why Dark Mode Is Efficient
A lighter workload for your screen and your eyes — especially on OLED hardware.
Real OLED Power Savings
On OLED/AMOLED displays, black pixels emit no light and draw almost no power — a true-black theme measurably extends battery life.
True-Black Themes
Set your Night Mode background to #000000 and OLED pixels switch off entirely where the page is dark.
Dim Layer for LCD
On LCD screens the dimming overlay reduces effective brightness — still easier on the eyes even without OLED savings.
Less Eye Strain
Lower screen luminance at night reduces squinting and glare fatigue during long sessions.
Lightweight by Design
The extension does its work at page load and idles afterward — it isn't a heavy background process.
Fully Private
No analytics, no tracking, no network calls — efficiency applies to privacy too.
Does Dark Mode Really Save Battery?
On OLED and AMOLED screens, yes — each pixel produces its own light, so black pixels draw almost zero power. Studies and manufacturer testing consistently show meaningful battery savings when interfaces are predominantly dark. On LCD screens with a backlight, savings are smaller, but the eye-comfort benefit remains.
Make Every Site OLED-Friendly
The catch: battery savings only appear on sites that are actually dark — and most websites aren't. Turn Off the Lights' Night Mode lets you set a true-black background on every site you visit, turning your whole browsing session OLED-efficient instead of just the few apps with native dark modes.
Performance Where It Counts
Night Mode applies at render time and then gets out of the way — there's no continuous processing eating cycles while you browse. Dark pages, lower brightness, lighter load.
Open Source, Private, and Free — Always
Turn Off the Lights collects no personal data, displays no advertising, and charges nothing. The extension is fully open-source under the GNU General Public License Version 2 (GPLv2), with its complete source code available on GitHub for anyone to inspect. It has been in continuous development since 2009 and remains one of the most trusted browser extensions available, with millions of active users across all major browsers. Stefan Van Damme is the solo developer and has maintained the extension with monthly updates for over 15 years.
How It Works
Get Dark Mode Everywhere in Under 30 Seconds
Turn Off the Lights is available in every major browser store and takes less than 30 seconds to install and activate. No configuration needed — it works instantly.
Install Turn Off the Lights
Add the free extension from your browser's store — Chrome, Firefox, Edge, Safari, or Opera.
Enable Night Mode
Open Turn Off the Lights Options → Night Mode tab and enable the Night Mode switch.
Customize Your Dark Theme
Pick your background, text, and link colors — or set an automatic schedule. Every website now loads dark.
FAQ
FAQ — Dark Mode & Battery
On OLED and AMOLED screens, yes — black pixels emit no light, so dark interfaces draw measurably less power. On LCD the savings are minimal, but eye comfort still improves.
In Turn Off the Lights Options → Night Mode, set the background color to pure black (#000000) — that's what maximizes OLED savings.
No — it applies styles at page load and then idles. There's no heavy background processing.
Yes — completely free and open-source, with no ads, no tracking, and no account required.
Dark Mode Guides
More Dark Mode Guides
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