User blog comment:FairyRaven/Fairy Tail Chapter 406: The Girl Within the Crystal, Review and Commentary/@comment-25111584-20141027131819/@comment-5303512-20141027230350

Gentlemen Please, let me introduce what I think about the Lumen Histoire being "Light" or "Darkness", I think their both right.

It's like in Pirates of the Carribean, the story of Davy Jones, they say he fell in love with a women but others think he fell in love with the sea. Then Calipso said, their the same story, different version and both are true.

So the way I think LH is, is that it can be either Light or Dark depending on the will of it's caster, something from Pretch's teachings when he was Fairy Tail's second master.