Fade
Fade verb - To cease to be visible.
Light up
Light up verb - Start to burn with a bright flame.
Both terms in one sentence
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There's a particularly good example of this in "Double Jeopardy", when Teal'C's robot duplicate shoots Cronus in the back several times with a staff weapon - his eyes flash in time with the energy blasts hitting them, then light up one last time and slowly fade as he expires.
Source: Eye Lights Out - After the text has passed, the mask stays there for a moment, a pair of red eyes light up inside the eye sockets, and only then does the mask fade, leaving us with an image of two sinister eyes glowing in the darkness, accompanied by chilly musical tunes.
Source: The Stinger - At least three Maverick Reploids in Mega Man X were right there: Sting Chameleon (active camouflage), Spark Mandrill (fade to black, his light bulbs light up, and then the lights return), and Boomer Kuwanger (fades in ninja-like).
Source: He Was Right There All Along
Cite this Source
Light up and Fade. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/fade/light_up
Fade & Light up. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/fade/light_up>.
Light up or Fade. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/fade/light_up.
Google Ngram Viewer shows how "fade" and "light up" have occurred on timeline