Inside the Barrow

[Hookbill the Goomba]

I've had a few thoughts about this topic and I've come to a few theories...

Both The Barrow Wights and the Nazgûl were (directly or indirectly) a result of Sauron's intervention, correct? Sort of. So, they may well have similar powers and such, yes?
Now, a little quotation from the books:

Originally Posted by The lord of the Rings Book 4, Chapter 8: The Stairs of Cirath Ungol

"All was dark about it, earth and sky, but it was lit with light [...] Paler indeed than the moon ailing in some slow eclipse was the light of it now, wavering and blowing like a noisome exaltation of decay, a corpse-light, a light that illuminated nothing."

This 'corpse-light' seems very interesting to me. Very appropriate for the Barrow Wight, wouldn’t' you say? If it is not the same light, then perhaps it is the same sort of power?