First half based on this text; second half is all Advent:
O gladsome light of God on high
and glory of eternity,
O heaven's holiness most bright,
Christ shining down on all we see,
we come now to the end of days,
the glow of evening fading fast.
In growing shadow still we praise
the Father, Son, and Spirit Blest.
Whether in darkness or at dawn,
still do we raise unwearied voice
in praise of you, our shining sun,
in whom we glory and rejoice.
Still do we hold the hope of sight,
whether at morn or midnight deep,
of you who shine forever bright,
whether we wake or deathly sleep.
Dwelling in shadow of our doom,
waiting beneath the dark'ning skies,
still do we know that day comes soon.
Yet will the sun of justice rise.
Light of the world, world's only light,
whether we see your face or not,
give us the hope that dawn shines bright,
strength to yet praise your glory, God. Amen.

A flock of Red-winged Blackbirds (Agelaius phoeniceus) flying into the sunset. Taken at Quivira National Wildlife Refuge in Kansas. By Jerry Segraves (en:User:Jsegraves99) – http://www.fhwa.dot.gov/byways/photos/64091, Public Domain, https://commons.wikimedia.org/w/index.php?curid=733208

