A Darkwad, also known as a Darktard, is a person without lights travelling on the playa at night. Being lit at night is not just fashionable, it’s also a survival mechanism. After a day spent hiding from the horrible rays of the daystar under a comfortable shade structure, the night becomes positively crowded with people, bicycles, and mutant vehicles, all piloted by minds of dubious sobriety. If you don’t want to be run over, you need a light: whether it’s a humble headlamp or an entire costume made of EL-wire.
From Kit O’Connell’s amazing Burner Lexicon! http://kitoconnell.com/writing/lexicon