He slumped, then brightened slightly with an idea.

The sky brightened slightly, but the sun never really came.

His expression brightened slightly, and he walked toward me.

Then his dour face brightened slightly and he looked down.

His face brightened slightly as he saw her, and he came over and sat down at the table.

Koudelka stared around uneasily, and seemed to brighten slightly upon not finding someone.

Squinting in one end of the big tube, he turned the tool until the cathode surface brightened slightly.

May brighten slightly after stenuous work due to an increase in circulation.

Roy watched for another minute, but nothing happened, except that the green stars brightened slightly.

His eyes, which had seemed glazed over, brightened slightly.