dim: description: Increases or decreases brightness of lights fields: entity_id: description: Name(s) of entities or groups example: 'light.living_room' offset: description: New light value is old value plus this offset (full brightness is 255). Can be negative to decrease brightness example: 30 factor: description: Factor to multiply old light value with. Use either offset or factor, not both! example: 1.3 transition: description: transition time in seconds example: 1