The Dimmer is the main entity in The Halls. The Dimmer is a single, png-like irregular entity that appears occasionally throughout The Halls. This entity causes the lights to temporarily turn off and follows the single straight path of the level. It shows up from afar, constantly moving at high speeds through the Level, moving back and forth. The entity is completely harmless, even at close contact, but only if the player stands completely still, not even moving their head. After the entity passes, it's recommended to wait 1-2 seconds before continuing to move, to avoid aggravating the entity.

If you encounter The Dimmer, simply wait for it to pass, if you already noticed it from a distance, just stand still once it gets to you, also rember not to move your head when the entity passes.

Do not, under any circumstances, try and outrun The Dimmer.