Flashlight on Alone

What the show allows

Appears on at least one compiled 'approved items' roster as a selectable tool, which sits in tension with the separately-documented prohibition on 'unapproved technology (anything with a battery or an engine)' -- likely resolved in practice by production-issued headlamps counting as standard non-selectable safety gear rather than a chosen item, but sources do not fully reconcile this; flagged as a conflict.