Board Thread:Off Topic/@comment-24993958-20151118083252/@comment-24994749-20151201005444

Well, he can place them around, but I assumed there should be something stopping him from just leaving lamps all around beyond the aura cost. That's why he needs to know where he left them.

And the division rule struck me as an easy way to regulate the amount he can make and keep some control on how many and how shiny the lamps can be.

It would be horribly stupid for him to just go make one giant lamp that size. But the fact he can allows him to gauge when he trains how much light he can generate at a time.