Genre: 
Full text: 
Nox et tenebrae et nubila confusa mundi et turbida lux intrat albescit polus Christus venit discedite | Caligo terrae scinditur percussa solis spiculo rebusque jam color redit vultu nitentis sideris | Te Christe solum novimus te mente pura et simplici rogare curvato genu flendo et canendo discimus | Intende nostris sensibus vitamque totam dispice sunt multa fucis illita quae luce purgentur tua | Sit Christe rex piissime tibi patrique gloria cum spiritu paraclito in sempiterna saecula
Fulltext source: 
https://www.preces-latinae.org/thesaurus/Hymni/NoxEtTenebrae.html; Randel 388-08
Notes: 
sometimes with the verse "Sic nostra mox obscuritas" (3rd);
Notes: 
cf. 008352.2 for the 1632 Urban VIII revision of this hymn, which begins the same but has extensive revisions in the latter half
CAO sources: 
SL
CAO: 
8352