Hmm... I guess it's hard to be sure. [For one, whether they really need the light, or if it's just the easiest solution to the matter. But also:] If they weren't in our worlds. What if, you can only see them if you're dead?

[Not that he actually wants to imagine having unknowingly gone through life with invisible wispy entities following him around and having inconsistent numbers of eyes, mouths, or fingers at him. As much as he wants attention and praise, that's not exactly the sort of audience he was hoping to cultivate. And yet, standing here with this fresh uneasy chill running down his spine, it's easy to imagine them doing the spooky invisible thing that ghosts do, except with more of the cultural expectations humans seem to have about ghosts.]