Wow Netherlight Temple Location

Automatic resurrection
Cannot summon other players
Class: Priest
Spell: Naaru Lightshift
Level: 1 - 110
Territory: Sanctuary
Instance type: Class Hall

Location:According to wowpedia Netherlight Temple is apparently located on a planet called Niskara which is under control by the legion.

Netherlight Temple is the order hall for the priest class. It is initially under the control of a corrupted Naaru, but priests help cleanse the being of the shadowy taint that consumes it, restoring it to its uncorrupted glory. Of special note is that fact that Calia Menethil, sister to Arthas Menethil, reveals herself at last as alive and well, thanks to the efforts of Alonsus Faol.

The Temple is divided into three sections, each aligned with one of the priest specializations in name: the Hall of Balance, home of the forge for Artifact Weapons, the portal to Dalaran, and Felsmith Workbenches; the Sanctuary of the Light, where the purified naaru now floats; and the Sanctuary of the Void.

Many types of priests can be found within the halls, kept under a watchful eye by the wandering Lightspawn. They include Anchorites, redeemed Crimson Priests, High priests, Shadow priests, Void priests, Hexpriests, and Priestesses of Elune.