O Oriens

Day 5's antiphon addresses the coming Christ as "Oriens," literally Rising Sun, but often translated as Morning Star. It meditates on Christ as a light entering the darkness of our world (see Isaiah 9 and Malachi 4:2). "Oriens" also foreshadows Christ's resurrection at the time of his Incarnation.

O Oriens

O Oriens,

splendor lucis aeternae, et sol justitiae:

veni, et illumina sedentes in tenebris, et umbra mortis.

O Morning Star,

splendor of light eternal and sun of righteousness:

Come and enlighten those who dwell in darkness and the shadow of death.

https://www.youtube.com/watch?v=RkAW7_hWvLU