Speaking of the blue flames ... I think we all know by now that you need to bring the flames at each of the locations (Hateno and Akkala) from the source to the labs. And, along those "paths" to get the flame from point A to point B, there are the lanterns on posts that you can light ... used to make sure that if your torch or wooden club goes out, you can re-light it without going back to the source.
However, I kept thinking that there would be some sort of "thing" that happens if/when you lit ALL the lantern thingys in each area. I was disappointed to find out that nothing special happens when you do light them all. To me, that was a missed opportunity. It would have been cool to have NO indication that lighting them all resulted in a reward of some kind, and that if you just happened to do it, you'd get a perk.