Curious cat installed applet it against his wishes (running similar program at same time) and found it that yes, it's a dimmer. 2 channels.
Observations:
--It will dim the sh** out of it. Powerful tool.
--It does not have anything near those warms reds and oranges that redshift has. It's a blunt light-to-dark on a straight continuum with maybe yellow filter doing the work. my apps will go from blue to green.
-did I say it was powerful? may keep it.
Nice to have choices. Answered my own questions. Still think it's weird to designate myself Best Answer so please mark SOLVED. thank you.
