華嚴經探玄記 4.29

4.29

初釋名者，謂如來之光明，光明之開覺，謂依體起用，依用成益，皆依主釋可知。

First, explaining the title: it refers to the light of the Tathāgata, and the awakening of the light; that is, arising function based on essence, and achieving benefit based on function. These are all tatpuruṣa compounds, as can be understood.