i once connected a 100 watt light bulb on one output of my Hafler 500 instead of a speaker.
the bulb did light up, but a bit weak; i then increased the vol. level and after less than a minute, a fuse in the Hafler blew up; 15 amp rated fuse. i used a 60 Hz sinewave for that, and once the fuse replaced, no problem with the amp.
i also tried it playing organ music. the light intensity would follow the music...
no cheese smell, but some would say i'm a cheese head, right?