N木ig木ht木L

N木ig木ht木L (called on the JASRAC database, and called NOfCoTreIsLtUM on the Xenoblade Chronicles X Soundtrack Selection) is Disc 3, Track 3 on the XenobladeX Original Soundtrack and Track 9 on the Xenoblade Chronicles X Soundtrack Selection. It is split into two parts: the first plays from the start until 2:42, and the second plays from then until the end. The first part of z5m20i12r04a28 is a remix of this track.

The first part plays in Noctilum during the day. The second part is a more subdued remix of the first and plays in Noctilum at night.

Etymology
Combining these three gives 夜光森, 'Yakou mori' ('night glow forest'), which aligns with the JASRAC version of the title. This is very close to the Japanese name for Noctilum, 夜光の森 ('Yakou no mori').
 * The kanji 木 means 'tree' in Japanese, and when three are together (as in the kanji 森) it means 'forest'.
 * 'Night' in Japanese can be written 夜.
 * 'Light' in Japanese can be written 光.

The Soundtrack Selection title can have its lowercase and uppercase letters separated to obtain 'forest NOCTILUM'.