The Cheat's Lightswitch
From Homestar Runner Wiki
The Cheat's Lightswitch is a special lightswitch Strong Bad installed below his regular lightswitch to accommodate The Cheat's small stature. It only appears in a few of the Strong Bad Emails, most notably in techno, where The Cheat used it, along with his glowstick, to throw his own Lightswitch Rave. Strong Bad disapproved of this, reminding The Cheat that he installed it so that The Cheat could turn the lights on and off, not so that he could throw lightswitch raves. The sign above the switch sometimes reads "The Cheat's Lightswitch" and other times simply "The Cheat".
The lightswitch is featured on Disc 1 of the strongbad_email.exe 3 DVD Set in the opening sequence. Strong Bad accidentally switches on The Cheat's lightswitch when he walks into the room. Strong Bad says "Wrong switch" after hearing The Cheat's techno music and the lightswitch rave starts up with The System Is Down. The animation is done in 3D, and it would seem that Strong Bad flips on the top lightswitch, which is not The Cheat's lightswitch.
In Strong Bad's Cool Game for Attractive People, the game labels it "Rave Switch", and Strong Bad deliberately throws Lightswitch Raves when the player examines it (though he remarks that he sometimes get tired of it).