Don’t use any of the Get player XXXX (Index) nodes.
Incorporate BP Interfaces
Incorporate Many-to-One Event dispatchers (lights bind to Manager event)
Lights should be BP Actors vs simple point lights dragged into the level. As an actors you can add a sphere collision component of whatever size to auto detect the player (scale to light radius). This can be used for automation or 2 way communication with the Light Manager.