Only the Sun never goes out.

The sun is the only light that never goes out. It shines 24-7. The darkness we experience is when we turn away, the earth turns away, from the sun. The sun itself has no darkness ever.

1 John 1:4-5 KJV
And these things write we unto you, that your joy may be full. [5] This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all.