Luna is described as 'A lightweight automatic theme changer for Windows 10' and is an app. There are three alternatives to Luna for Windows, Android and Android Tablet. The best Luna alternative is Auto Dark Mode, which is both free and Open Source. Other great apps like Luna are Adaptive Theme: Auto Dark Mode and Easy Dark Mode.
Auto Dark Mode helps you to be more productive. When it is light outside, we enable you to have a bright and clearly readable OS. After the sun starts to set, your operating system switches to a matching theme to take care of your eyes.
Automatically switches the system dark theme based on the ambient light sensor — not a fixed schedule.
A useful utility software which facilitates the setup of Light and Dark display modes available in Windows 10, and enables quick switching between them.
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