I don't think that it really explained the concept of lumina very well. I literally went the entire game not using a single one. I only knew what they were when I played after defeating the final boss.
Edit: Forgot to add great game regardless, and a breath of fresh air.
Bleep blorp, I am an unfeeling ConstitutionBot. Laws are static and not open to interpretation. KLANK! What is this hu-man emotion called... love?-Swedish sven