NightLight - Rainmeter Plugin

A Rainmeter plugin for controlling Windows 10/11 Night Light feature directly from your Rainmeter skins.

Features

• Check if Night Light is supported on your system
• Get current Night Light state (enabled/disabled)
• Enable/Disable Night Light
• Toggle Night Light
• Get/Set Night Light strength (0-100%)

Installation

1. Build the plugin using Build.ps1 or Visual Studio
2. Copy the compiled NightLight.dll to your Rainmeter plugins folder:
   • For 64-bit: %APPDATA%\Rainmeter\Plugins\
   • For 32-bit: %APPDATA%\Rainmeter\Plugins\

Usage

Check if Night Light is Supported

[Measure_NightLight]
Measure=Plugin
Plugin=NightLight
Type=Supported

Returns:

• 1 if Night Light is supported
• -1 if not supported

Get Night Light State

[Measure_NightLight]
Measure=Plugin
Plugin=NightLight
Type=State

Returns:

• 1 if Night Light is enabled
• -1 if Night Light is disabled

Get Night Light Strength

[Measure_Strength]
Measure=Plugin
Plugin=NightLight
Type=Strength

Returns: 0-100 (percentage)

Control Night Light

Enable Night Light

[!CommandMeasure Measure_NightLight "Enable"]

Disable Night Light

[!CommandMeasure Measure_NightLight "Disable"]

Toggle Night Light

[!CommandMeasure Measure_NightLight "Toggle"]

Set Strength (0-100%)

[!CommandMeasure Measure_NightLight "Strength 50"]

Building from Source

Requirements

• Visual Studio 2019 or later
• .NET Framework 4.8
• Windows 10/11

Build Steps

1. Open NightLight.sln in Visual Studio
2. Select your target platform (x86 or x64)
3. Build the solution (Ctrl+Shift+B)

Or use PowerShell:

# Build for x64 Release
.\Build.ps1 -Configuration Release -Platform x64

# Build for x86 Release
.\Build.ps1 -Configuration Release -Platform x86

Technical Details

The plugin manipulates Windows registry keys to control Night Light:

• State: HKCU\Software\Microsoft\Windows\CurrentVersion\CloudStore\Store\DefaultAccount\Current\default$windows.data.bluelightreduction.bluelightreductionstate\windows.data.bluelightreduction.bluelightreductionstate
• Settings: HKCU\Software\Microsoft\Windows\CurrentVersion\CloudStore\Store\DefaultAccount\Current\default$windows.data.bluelightreduction.settings\windows.data.bluelightreduction.settings

License

This plugin is provided as-is for use with Rainmeter.