Each Row element that have a background image attached can also have the Parallax enabled.
Parallax is enabled by editing the Row element -> Parallax tab -> set option to On.
This Row has a Parallax Background
See how the image also moves when you are scrolling up and down? That's called Parallax!
This Row also has a Parallax Background
But we have a different image set, still related to lights and bulbs. Pretty cool huh?