Wow, so much better than 3rd party so called blue light filters. Works perfectly for me! Thanks Devs!!!!!
f.lux - f. lux is a piece of software for Windows, Mac, Linux, iOS, and Android that provides a blue light filter over your screen. Research suggests limiting our exposure to blue light in the hours before bedtime can help us fall asleep faster.
LightBulb - Background application that adjusts screen gamma, making the colors appear warmer at night...
Brisync - Synchronize your external monitor brightness with built-in display.
Redshift Color Temperature Adjuster - Redshift adjusts the color temperature according to the position of the sun.
NegativeScreen - Invert your screen colors.
Iris mini - Iris mini is free cross-platform blue light reduction and PWM flicker free brightness software.