In the account of creation in Genesis 1, it seems that God describes many of the things He creates as being "good". Verse 2 indicates that prior to there being light, there was "darkness over the face of the deep". God's first created act, aside perhaps from the heavens and the earth themselves, is light. He specifically calls the light "good", but not the darkness.
So, was the darkness "not good", or did God simply not explicitly declare it as such?
In the beginning, God created the heavens and the earth. 2 The earth was without form and void, and darkness was over the face of the deep. And the Spirit of God was hovering over the face of the waters.
3 And God said, “Let there be light,” and there was light. 4 And God saw that the light was good. And God separated the light from the darkness. 5 God called the light Day, and the darkness he called Night. And there was evening and there was morning, the first day. Genesis 1:1-5 ESV