Light?

From time to time people wonder how God could create light before the sun.

Here's how:

Light is a synecdoche for the entire electro-magnetic energy field. In physical terms, this would have to be one of the first things created for the rest to 'work'.

If it wasn't created, the stars would merely be large dark blobs.

Perhaps the 'waters' that the Spirit moved over the face of has a similar physical scope. Maybe not 'water' per se, but some large fliud mass: undifferentiated sub-atomic particles?