Chen Collection, Upper Volume
Radical: Sun (rì)
Kangxi Strokes: 17
Page 500, Entry 32
Collected Rhymes (Jiyun), Rhyme Meetings (Yunhui), and Correct Rhymes (Zhengyun) state it is pronounced jiao (rising tone).
Jade Chapters (Yupian): Means bright. The same as the character pronounced mu.
Text of the Five Classics (Wujing Wenzi): The character pronounced jiao refers to the white color within jade or stone; it is used interchangeably with the character pronounced jiao in the phrase regarding bright moonlight. Book of Odes (Shijing), Songs of the States (Guofeng) uses this form. Note: In current versions of the Book of Odes (Shijing) and the Explanatory Text (Shiwen), most use the radical for sun; this is an error originating from scribal transmission.
Also, Collected Rhymes (Jiyun) states it is pronounced hao (falling tone). The meaning is the same. The character pronounced mu was originally written with this component. Also refers to the character pronounced hao.