High elves?

[Voronwe]

I am not entirely sure that Glorfindel ever saw the light of the Trees.

You have Gandalf's word for it in The Fellowship of the Ring that Glorfindel had dwelt in the Blessed Realm. This might not been seen as definitive proof that he had seen the light of the Trees however, but there is a statement proving that he did from JRRT in the essay 'Glorfindel' (HoME XII):

he left Valinor in the host of Turgon

However, as has already been pointed out, all the elves of Aman were High Elves, irrespective of whether they had seen the light of the Trees or not.

[ January 14, 2003: Message edited by: Voronwe ]