In this little Ikea hack, a knife switch is used to add some Frankenstein’s lab ambiance to a set of Ikea under-counter lights. As noted in the piece, this is only (relatively) safe because this type of lighting uses a wall-wart AC/DC transformer, and even then, you probably wouldn’t want this around kids, animals, and you shouldn’t mess with it unless you know what you’re doing.

Frankenstein light switch – [via] Link