I used the word believe because, i asked you to test out f.lux yourself to see if it was effective for you and you never responded, making me think that you had written off the idea without even trying it. Because as i said then, the combination of f.lux & similar programs + gel filters if needed should be superior than either alone.
And it sounded like your opinion of f.lux was based on LEDMuseums comparisons, and if you have done your own test now i think you will agree with me, that the spectrum they showed can’t have been from one of the current f.lux lowest colour temperature modes. And if am right that would mean, that is not a very representative picture of how much of the blue can be eliminated with a correctly tuned f.lux.
I think most who are unsatisfied with f.lux’s blue cancelling ability have, tested an old version before the lower colour modes became available, an low contrast screen limiting the potential to block any kind of light, or set up f.lux wrong & never seen the lowest modes.
But i agree with you here hank no blue at all is of course best, but what a correctly set up f.lux does with the problem of 6500k calibrated screens goes a long way to lessen the negative impact of them.
And i just told you OLED & plasma based screens have self emissive subpixels, if the calibration tells the screen the colour mix should be totally biased towards red so the blue sub pixel is off it would be.
And displays generally don’t have white pixels, they have a Red, Green, Blue subpixel for RGB 
There is a Sharp line of panels that have a yellow also.
Generally the higher the contrast you can find in a screen, the higher the subpixels ability to block or cancel out the colour not wanted with the colour filters, that is what the different sub pixels are in LCD displays, different colour filters similar to the gel colour filters you use.
If you want to change the bias more thoroughly than what f.lux can provide you need to change the calibration & set up a “after dark” mode like i have done.
My monitor is the Samsung 46C750 HDTV it has about 3000ANSI contrast & is one of the last high end CCFL TV’s made, after that everything turned LED backlit (or maybe one could call it sidelit ;)), it could be a reason for that it is more effective at cancelling out the blues but the contrast plays a big part also.
For example on my Android phone i run the latest Cyanogenmod 12.1, it has a new feature called LiveDisplay, it is a very basic CMS where you can turn the green & blue subpixels almost completely off, & lower the colour temperature as low as 1000K for the Android GUI, BUT because the screen i have on my phone probably don’t have more contrast than maybe ~800 i still get a slight blue glare from the screen if i look at it from distance.
If it would have had a much higher contrast or max light blocking ability (that is what contrast in essence is) or been a OLED screen with almost unlimited contrast because it is self emmisive, it wouldn’t have that blue leak even when it is calibrated bias mostly to red. But even so it is much nicer than nothing to be able to tune the colours on for a night mode than nothing
If you want to tune the colour bias more to your liking you need to learn how to calibrate your displays, but this is tricky more so on monitors than HDTV’s, because cheaper monitors usually don’t have
inbuilt calibration controls like a CMS or a 10 point white point control like most better HDTV’s have.
Check out avsforums Display Calibration to start with for example, if you want to learn how to calibrate your displays.
