Here are great articles for Aset and Nebet Het from Henadology blog:
Here is Aset’s:
Here is Nebet Het’s:
One bit that caught my eye was this: (Meeks, Mythes et Légendes du Delta, §7). A fragmentary text concerning a lamp-lighting festival celebrated in Letopolis (Ibid., §18) relates an incident in which Nephthys hides herself from Seth in the water at night, but is discovered by him when he lights a lamp with the oil of the abdu fish, whose characteristic function is to swim before the solar vessel and warn Re of the approach of Apophis; note that this fish is said to have been born on the last of the epagomenal days, which is also the day of the ‘birth’ of Nephthys (Meeks, p. 230).
I would love to find a date for this festival. Set and Nebet Het beating Apep festival with lamps. How awesome is that?