Comment by ben_w

Never mind that, they're ignoring light bulbs for the S&R stuff.

At least, best I can make out over this UI choice: https://imgur.com/gallery/bad-ui-5t0O0SH

(Why, of all the things, would someone use a fire as their example for this? Fire is famously a light source. Also, famously, smoke is a thing that blocks out light from above).