Possible to lower brightness even further?

[tomasz1986]

From my testing, the brightness keeps going down until ~50% but then it stays at the same level even when the setting is at a lower value. The same thing happens on multiple devices, so I don't think this is hardware-dependent. It could be related to Windows itself which is the same configuration of Windows 10 on all of them.

However, other programs, e.g. https://github.com/datbnh/ScreenDimmer, are able to make the screen go even completely black when set to 0%. I'm wondering whether it could be possible to make LightBulb also dim the screen further down using a similar technique.

The reason why I need to lower the brightness more than allowed by LightBulb (and the OS) is that I'm using it on a Windows tablet which I need to be able to use at night with no lights turned on. Without additional dimming, the screen is still much too bright even at the minimum brightness.

[Tyrrrz]

I'm able to dim mine pretty much to black. Did you unlock the gamma ranges on your PC? There should have been a popup when you run LightBulb.

[tomasz1986]

Hmm, so this is strange. I always unlock the gamma ranges when running LightBulb for the first time, but I checked the registry, and the value wasn't there. I've added it manually, and now the brightness can be decreased much further than before.

I had to do this on two systems, while on yet another one, the value was still present in the registry. I wonder what could cause it to get removed from there.

[Tyrrrz]

Hard to say. But LightBulb should check that value every time it runs, not just the first time.

[tomasz1986]

I don't think it does, or at least something isn't working right, because I've just restarted LightBulb with the whole GdiICMGammaRange removed from the registry, and there was no prompt about having to unlock the gamma ranges.

[Tyrrrz]

Yeah that would imply something isn't working right