The moon light (not sunlight!) can be bright sometimes. This is night when you're stumbling home from a nomikai after work. What is this light from the moon called? It's moon light. This word can also mean a moonbeam as well.
This is a jukugo word, which usually means on'yomi readings from the kanji. Since 月 has two on'yomi readings, here's a mnemonic to help you remember which one to use:
The moonlight brings out a strange creature known as a Geck-こういち (げっこう), which are geckos with the head of こういち. Imagine a swarm of them all crawling out of their crevices once the moon comes out.
The moonlight was very beautiful last night.
White moonlight enters through the curtains.
In the moonlight, there was a princess of the moon.