Is Lightbulb adjusting the monitor brightness using hardware controls(DDC/CI), or is it a software adjustment at the system level?

[Leroy-X]

After changing the brightness in the settings, the monitor's brightness settings don't seem to change, so I guess it might be a software-level brightness modification.
I hope to add the option of hardware adjustment, based on DDC/CI or something; maybe I subjectively feel this would be more power-efficient.

Thank you very much for such a powerful and convenient software!

[Tyrrrz]

It's using Windows API to upload the gamma ramps to the GPU driver. So technically hardware controls, but abstracted with an additional layer.

The brightness is also adjusted through gamma ramps, by simply dimming every color channel inverse to the configured brightness. This makes it work the same way on devices without brightness controls (such as desktop PCs), as well as those that have them (laptops, tablets, etc.).