Ok, because usually this bug means that this expanding your range didn't work. Hnmm.

Overhead lights will always be more alerting due to their physical location regardless of how dim you can get them to be. Think about how alerting and energizing the sun is on a clear day when it's directly overhead. So, this is a natural reaction after living on this planet for thousands of years (at the very least).

So, when you're only using lights that are physically in a low location (like a desk lamp), the natural reaction to that will be similar to the reaction of the sun being at or near the horizon during sunset.

As you're probably thinking by now, yeah there is more to this than just the color temperature or brightness of the light. The higher the physical location of the light source, the more alerting it is.

@herf That was it thank you so much!

Yes we need "disable less" in a whole lot of cases....still trying to figure out a way to say how much.

Yes, we might have to put a big master list in there eventually (or at least a big reset button), but we tried to do the "relevant" list of apps - ones you've used recently to keep it easier.

Oh, awesome -- thanks!

One thread next to this one suggests updating NVIDIA drivers, if you have NVIDIA.

Also, some monitors have on-screen controls with "automatic" settings that can be disabled.

thanks we will look into this...

Yes, this is a nice idea - the trouble is that there has to be a patch of white on the screen so you can adjust the colors.

Otherwise we would do it right away. :)

@herf Win10. Apparently, it was not the latest version. I thought f.lux would auto update or at least tell me when a new version is available. After updating, the flickering was gone.

To be honest, I don't use it and I don't care for it. It's only there because some people wanted it for certain things, and Mike and Lorna (the f.lux team) felt it was worth adding and so they added it. You don't have to use it just because it's there. Hell, I don't even use any of the automatic settings. I keep all 3 color temperature modes set to 800K, and so when I want 800K I just launch f.lux. I don't even allow f.lux to start with Windows. I use probably 5% of the program's abilities, but I'm one of the biggest fans.

So, just use what makes sense to you to use and call it good.

Thanks all. Installing the newest Nvidia driver also fixed it for me.

I just want to point out that v4 is under promoted. There's no mention of it on the homepage. I've been using v3 for months now, chaffing due to the lack of exactly the features found in v4.

The only thing missing is complete control over the schedule and triggered transitions. Native support for TP-Link bulbs would be nice, but the point of this post is that the existence of v4 isn't obvious. :)

Love the software and some of its UX. I only wish it gave me more control.

Found it, thanks.

We use the Windows color profile for each display. You set it up in Windows control panel.

I think I found the problem. I have Datacolor Spyder calibration that was monitoring the system and so I exited that program and set slider to 3600K to match my lamp. Seems to be holding steady now. Thank you for the program to set Kelvin as needed/wanted.