The Electrical Water Pageant is a water based electrical parade (similar to the Main Street Electrical Parade) that takes place in the Seven Seas Lagoon and around Bay Lake.
Typical schedule, but subject to changes.
Disney's Polynesian Resort - 9pm
Disney's Grand Floridian Resort - 9:15pm
Disney's Wilderness Lodge - 9:35pm
Disney's Fort Wilderness Resort - 9:45pm
Disney's Contemporary Resort - 10pm
Magic Kingdom - 10:25pm
(When park is open after 10pm)