throw the switch on

[Mike Hussey]

Danny wants to rob a casino vault:

DANNY: Second task, Power. On the night of the fight, we're gonna throw the switch on sin city. Basher, it's your show.

What does "throw the switch on" mean?

Source: Ocean's Eleven (a 2001 American heist film directed by Steven Soderbergh and written by Ted Griffin)

 

[Tdol]

Turn the electricity off- it you throw the lights, you turn them off. In the movie, they want to cut the electricity to be able to rob the casinos.