What are some alternatives?
When comparing RedshiftGUI and LightBulb, you can also consider the following products
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.
SunsetScreen - Whether you're a morning lark or night owl, SunsetScreen allows you to set the time of the...
Redshift Color Temperature Adjuster - Redshift adjusts the color temperature according to the position of the sun.
Desktop Dimmer - Enable darker-than-dark dimming for internal and external screens.
CareUEyes - CareUEyes is an eye protection software for windows that comes with blue light filter, screen dimmer, and break reminder
Iris mini - Iris mini is free cross-platform blue light reduction and PWM flicker free brightness software.