Does Darth Double Light Saber light up?

It seems you're asking about a fictional lightsaber, but I'm not sure what "Darth Double Light Saber" refers to. There's no known character in Star Wars called "Darth Double Light Saber," and no known lightsaber with that name.

Could you be thinking of:

* Darth Maul's double-bladed lightsaber? This is the most common type of double-bladed lightsaber in Star Wars.

* A specific toy lightsaber with that name?

Please provide more details or clarify your question so I can help you!