In Gbaya, the notion of something shining, radiant or gleaming is emphasized in the referenced verses with lak-lak, an ideophone that describes something that shines.

Note that in Lamentations 4:7, the “shining” refers to the pure snow in the beginning oif the verse.

Ideophones are a class of sound symbolic words expressing human sensation that are used as literary devices in many African languages. (Source: Philip Noss)