@lordofweed The goal is to have less blue, not make more red which can appear similar but, means you're still seeing the same amount of alerting light, make sense? https://fluxometer.com/rainbow/ check this out and see how f.lux and different filters change the spectrum.

@herf cool, so just a hair past blue is more violet blue instead of regular blue! I had always wondered this as led bulbs have that half blue / violet spike and maybe that's part of what makes their strange tint, example GE's Align PM. I think the lack of aqua / cyan also plays a big role in the off blue/violet tint.

@inGearX Well, if your really curious, do you use Linux?

@alexncfc said:

I am very interested by the concept of filtering out the blue light, but I am noticing that since using these blue light filters on my PC and phone, I have a banging headache. I actually feel strained looking at the screen with the filter on (when I turn it off temporarily, admittedly it's even worse, it feels like I am being blinded!)

Has anyone experienced similar issues such as eye strain and headaches when using the filter? Also, has anyone noticed that they feel they sleep better and feel refreshed etc since using f.lux?

The eye strain and headaches you are experiencing may be caused by setting the screen brightness too low for your eyes to focus comfortably since warmer colors have lower intensity. Try adjusting the brightness a little higher than the current setting that is causing the strain. You can also adjust the lighting in the room that you are using the device in to a brightness that is relatively lower than your screen. Also avoid having just certain areas lighted in your room, like a lamp that only lights up a small area. Non uniform lighting around you can also affect the eyes.

Hope these helps rid you of your ailments. Cheers.

@DuoArtworks said:

Did i set something wrong in the settings?
http://prnt.sc/ckph1z
or what can it be ?

and how can i control the point that he stops when i want
http://prnt.sc/ckplr3

Thanks for every answer!

I can show you a Registry edit that will enable color temperatures warmer than 2700K, but they aren't 100% user-friendly unless you are very good with computers.

To the 2nd question, that's just a Preview. You can't control it. It's just showing you a quick overview of all the color temperatures.

Before the update W10, it worked ...

@Tungsten_smooth
Thank u v. Much .
This method works .

@lorna Not much diffusion, it is a mostly frosted neodymium glass, and it's in a domed white lamp, so it reflects off that as well. It's not a clear bulb, but I think ~1200 lumens may be just a bit over the top.

@lorna So do you have beta builds of 37.7 somewhere? Or something like a good time table for a latitude where it gets dark at 21ish all tear?
Because 3.10 is latest Windows, and has been for what... 3 years now?

As well: distance is the other major variable. You can use f.luxometer to simulate an iPhone at 2" distance, which is about what you'd want for light therapy!

Turns out VR goggles are a good option for this.