Chen Collection, Upper Volume. Radical: Sun (rì). 9 strokes. Page 493, Entry 16.
According to Broad Rimes (Guangyun) and Collection of Rimes (Jiyun), it is pronounced bian.
Explained in Explaining Graphs and Analyzing Characters (Shuowen Jiezi) as the appearance of joy and happiness.
Explained in Broad Rimes (Guangyun) as the appearance of sunlight shining.
Explained in Jade Chapter (Yupian) as meaning bright.