Is THIS how you imagined the vampires?

[Raynor]

Originally Posted by Lalwendë

Rather than comparing white and black or light and darkness, and equating these with good and bad, what Tolkien does is set up the contrast of Light and Unlight, neither of which require either brightness or darkness, black or white.

The fact that there are some nuances and exceptions doesn't refute the idea, especially considering letter #144, which I previously quoted. The fact that we have a Boromir or a Denethor, or whatever other "gray" character, doesn't mean that there is no morality, or good characters. And as far as your statement that light and unlight don't require brightness or darkness, black or white, I really don't see what base there is for this in Tolkien's work. Plus, the term unlight doesn't even appear in LotR or Hobbit, so it hardly constitutes a motive, being restricted to the Silmarillion.