Windle's Lighter

Source
This item is sold by Windle Sparkshine in Dalaran for 50s. It turns on a light in Dalaran.

Trivia
In the Harry Potter books, Dumbledore has a lighter, called a Deluminator which is  able to capture and turn on lights. The item may be a reference to Dumbledore's Deluminator, and is promoted by the fact that it is sold in Dalaran, a city of wizards.