The phrase "brighten about" is not correct and usable in written English
It does not make sense as a phrase and should not be used.
Her face is dumbfounded, though she then brightens about the 2016 awards, pointing out that four out of the seven films nominated had a leading actress.
The Sun brightens about 1% per 100 Myrs when aging: from the Paleoproterozoic to the Neoproterozoic ice age the luminosity has increased from 0.83 L to 0.94 L [5].
Analysis of recent data reveals that the surface of the planet has brightened by about 4% in the past decade.
Lights in the room brighten and about 100 vice-presidents of Goldman Sachs's London business blink into it, reaching for answers that will neither make them look stupid in front of their peers nor venal in the eyes of their superiors.
Even as prospects for the American economy brighten, consumers are about to face a new financial burden: a sustained period of rising interest rates.
When hot, add the onions, celery and carrots, season with salt and pepper and cook, stirring frequently, until the vegetables start to brighten in color, about 20 minutes.
I'm hoping this will restore Cumming's good humour, but it's asking a lot of rocket leaves to brighten a conversation about being brutally terrorised by one's own father.
In only 42 h, Comet 17P/Holmes was reported to brighten from a magnitude of about 17too about 2.4 at the height of the burst, representing the largest known outburst by a comet.
During the past five billion years, the Sun probably brightened by about half a magnitude; in early Precambrian time (about two billion years ago), the solar luminosity must have been some 20 percent less than it is today.
