The sir who created and added them in, informed me(as I have asked the same Q), that they’re not used for reading, more of a path marker for night time.
Though, he says he’s open to making them used for that.
Read for yourself:
Not necessarily. I noticed that you couldn’t read with them when I added 'em, and wasn’t sure whether or not that was a good thing.
At a minimum, they’re meant to be a cheap way to provide long-lasting minor illumination at night. Useful for navigating in the dark, and such. If people find (or suggest) other uses for them, though, I’m all for that.[/quote]