The source will be found in the way that artists tend to begin creation from chaos. The most obvious example is the Representation of Chaos which begins Haydn's "Creation", but the idea is also in Dryden's St. Cecilia's day Ode (later set by Handel). There is a possible reading of the Hebrew of Genesis 1.1 to support this.
The background is the best fabric I could find to represent chaos. The lettering is the first word of the Hebrew Bible (consonants only, letter forms derived from the great Isaiah scroll found at Qumran).
The text is from Genesis, but the allusion is to Haydn's "Creation", in which LIGHT is a sudden explosion of sound from the whole chorus and orchestra.