CLight

is the base class for the majority of Source's lighting entities.

Classnames:
 * - The standard light entity. It emits light in all directions.
 * - A light entity made to emit light in a certain direction.
 * - Older name for.
 * - An entity like which simulates sunlight.

Unless the entity is given a targetname, it will remove itself upon spawning because the game no longer needs it for anything. Named lights are toggleable and can take inputs but do a simpler light calculation and pieces are limited to up to 2 toggled lights shining on them at once. To be clear, this applies to  and everything inheriting it.