The Cheat's Lightswitch

From Homestar Runner Wiki

The special lightswitch Strong Bad installed below his regular lightswitch to accomodate the Cheat's small height. It only appears in a few of the Strong Bad Emails, most notably "techno" in which The Cheat used it to throw his own Lightswitch Rave. The sign above it sometimes says "The Cheat's Lightswitch" and sometimes simply "The Cheat."

The lightswitch is featured on Disc 1 of the Strong Bad Email's 3 DVD Set in the opening sequence. Strong Bad accidently 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 begins. 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.

Complete Filmography
techno (debut)
interview (easter egg)
monument (easter egg)