The Light and Dark Elves Picture

The light elves, also known as Ljossalfar, are beings of graceful shapes and soft features, who enjoy dance and music. His home is the kingdom of Alfheim (or Ljossalfheim).

The dark elves, also known as Svartalfar or Dvergar are beings of grotesque appearance, coarse features, long beard and short stature. Are very similar to gnomes. Sunlight could burn them or petrify them. His home was the shadowy kingdom of Svartalfheim.
Monsterpedia #4: Brussel Sprout
WoL - Kirby Wickham
The Light and Dark Elves
Lucian Reference
Sky Made by Your Smile