Should she glow?

[Lalaith]

Ah, a nice nerdy discussion about healing, just what I was hoping for!

That's a very good point about Glorfindel.
But I suppose it could depend on whether a fragment of the blade was in the wound. In Frodo´s case, not only was there a fragment but it had been there for two weeks, working its way close to his heart.
Kili´s wound was only a couple of days old. Maybe even a Silvan elf could heal Morgul wounds if caught early.