/ˈreɪ.di.əns/
a special bright quality that shows in sb’s face, for example because they are very happy or healthy 容光焕发；红光满面
Radiance is a glowing light shining from something. 光辉 [also 'a' N]
The dim bulb of the bedside lamp cast a soft radiance over his face.
床头灯微弱的灯光给他的脸上涂上了一层柔和的光辉。