The artificer infusion Radiant Weapon has the following property as one of its effects (E:RftLW, p. 62; WGtE, p. 182):
[...] As a reaction immediately after being hit by an attack, the wielder can expend 1 charge and cause the attacker to be blinded until the end of the attacker’s next turn, unless the attacker succeeds on a Constitution saving throw against your spell save DC. [...]
This effect does not impose any restriction on what kind of attacker can be blinded by this (e.g. "after being hit by a melee attack" or "an attacker you can see"). However, to me, it seems odd that the weapon can blind a long-ranged attacker or someone who is hidden (and therefore the wielder of the radiant weapon doesn't even know the attacker's position).
Can the artificer infusion Radiant Weapon really blind a ranged or hidden attacker?
Is that really how the infusion works, or am I missing something? I know the official artificer is recent, but is there any errata or Sage Advice about this effect of the infusion?