Night Light CLI 🌓

Control Windows 10/11's Night Light feature programmatically.

The binary format of the registry value was reverse engineered from NightLight.cs in the tiny-screen project by Maclay74, and converted to Typescript with help from ChatGPT.

For changing the scheduled Night Light settings via a slightly different registry key, see this post: https://superuser.com/a/1209192.

Compatibility

Windows Version	Status
Windows 11 22H2	✅ Tested
Windows 10 21H2	❔ Untested but should work

Please open an issue if you find that this package does not work on your version of Windows.

Contribution

Since this works by modifying a single registry key, it can be done in any language. A few examples are implemented already.

Language	Status
TypeScript	✅
CLI (NodeJS)	✅
C#	⬆️ upstream
Python	✏️ Open a PR
Rust	✏️ Open a PR
Powershell	✏️ Open a PR
Other	✏️ Open a PR

Getting started (TypeScript)

const nightLight = new NightLight()

console.log('Supported:', nightLight.supported())

console.log('Enabled:', await nightLight.enabled())

console.log('Toggling')
await nightLight.toggle()

console.log('Enabled:', await nightLight.enabled())

Getting started (CLI)

npm i -g nightlight-cli
nightlight toggle

...or...

npx nightlight-cli toggle