Came here to add another voice to the discourse that an iPad is most definitely not a "light-emitting eReader" in popular vernacular. That term calls to mind recent e-ink devices with frontlights, which are often used in place of LCD-devices to allow for some time away from harsher backlit screens before bed.
Burying that lede several sections deep feels almost purposely misleading, either that or just incompetent in my opinion.