O Oriens!

For some reason, Oriens means the clear ring of a bell to me.

O Dayspring! O Morning Star!

From Wiki:
O Oriens

The Dawn Breaking, the Light of the World

Latin:
O Oriens,
splendor lucis aeternae, et sol justitiae:
veni, et illumina sedentes in tenebris, et umbra mortis.


English:
O Morning Star,
splendour of light eternal and sun of righteousness:
Come and enlighten those who dwell in darkness and the shadow of death.


Isaiah had prophesied:
"The people who walked in darkness have seen a great light; those who lived in a land of deep darkness—on them light has shined." Isaiah 9:2


There is a great little Catechesis of the Good Shepherd song that goes well with this!