taru-adjective, adverb taking the 'to' particle
brilliantly; brightly; dazzlingly
Describes a strong, radiant light shining vividly. Often used in literary or formal descriptions. Functions as a taru-adjective or adverb with と.
満月が煌々と輝いていた。
The full moon was shining brilliantly.
街
The streetlights are brightly illuminating the road.