What Gets Them Going: Black power rings (That's literal black-colored rings, not a political thing
Likes: Dead superheroes, Laughing at Purple Lantern
Dislikes: Light (shocking), Convoluted storytelling
Technically speaking, Black Lanterns represent DC character zombies given their re-animation of fallen superheroes. They contain all the typical powers of power-rings, including any metahuman abilities of the host body.
They can be taken down with white light, and a whole other host of crap you're better off reading yourself.