OH Wait!
I get it now, it's the little motor that turns the twinkle wheel that's making the noise. I was either thinking about it way too much or way too little.
Anyway, the best way to isolate vibrations might be with those sharp, pointy, metal feet that good speakers and component stands come with, or to actually suspend the unit from above. The main idea is to reduce the amount of contact
surface area between the unit and the ceiling or wall.
Back when I used to DJ professionally, the club I was resident at had the turntables on a platform of plywood that was suspended by huge, industrial-strength steel chains. If we didn't do that, the bass from the subwoofers would have caused a feedback loop with the stylus of the turntable. It's sort of like a bass feedback loop when a normal microphone gets too close to the speaker, but it makes a low-low bass frequency instead of a high-pitched squeel. It's a very efficient way to blow your sub drivers!
The only other effective way for isolating turntables from speaker vibrations (in a pro-sound setting) was to place the turntables on top of stacks of cinder blocks.
The other kind of noise that may be audible is being transferred through the air itself. In this case, your light driver could be levitating with anti-gravity supports, and you could still hear it. If this is the case, then you probably want to look into some acoustic insullation (foam, fiberglass, etc.) to absorb or redirect the sound waves moving through the air as well. That is of course unless maintaing an airless vacuum inside your attic isn't a problem...
Good luck!
-THEO-
