For one point: What is that thing, and what does it do?
Only a complete and specific answer will earn a point!  
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				Experts? 
			
			
			
				Reflector?
			
			
			
				Yes, but this one has a difference. 
			
			
			
				It comes with a second-hand attachment - sorry
Back on topic - the reflector looks like a prism. So is it intended to reflect in more than one direction simultaneously.
			
			
			
				It has another somewhat unique feature that increases its visibility
			
			
			
				It collects light from all directions: above, sides and from behind, and reflects all the light backwards.  Because of the multiple light sources the light flickers making it more visible.  And it is also visible in daylight.
			
			
			
				Quote from: D-type on October 20, 2012, 09:35:58 AM
It collects light from all directions: above, sides and from behind, and reflects all the light backwards.  Because of the multiple light sources the light flickers making it more visible.  And it is also visible in daylight.
That is not the solution
			
 
			
			
				Is it illuminated with a lamp?
			
			
			
				Quote from: RayTheRat on October 20, 2012, 04:26:57 PM
Is it illuminated with a lamp?
Only those lamps on other vehicles that shine at it
			
 
			
			
				Is the special feature down to what it is made of?
			
			
			
				Not quite that specific. More than one material could be used to give it the functionality that makes it special.
			
			
			
				Could it be as simple as a reflector that diffuses light from each of the facets to make it more visible?  If so, it didn't catch on, except for blue dots.
			
			
			
				Does it redirect the light it collects towards something like a license plate?
			
			
			
				Quote from: RayTheRat on October 24, 2012, 11:16:38 PM
Could it be as simple as a reflector that diffuses light from each of the facets to make it more visible?  If so, it didn't catch on, except for blue dots.
No, that's not it.
			
 
			
			
				Quote from: streamliner on October 25, 2012, 01:27:51 AM
Does it redirect the light it collects towards something like a license plate?
No, that's not it
			
 
			
			
				The special part of this reflector is not the lens at all. 
			
			
			
				Quote from: Otto Puzzell on October 25, 2012, 03:26:57 AM
The special part of this reflector is not the lens at all. 
magnetic? (to fix to the bumper)
			
 
			
			
				No, that's not it. 
			
			
			
				Is it to do with the reflecting material?
			
			
			
				No
The previous guess was closer
			
			
			
				so it is to do with the mounting method?
			
			
			
				Does the top, round section spin?
			
			
			
				Totally off the wall guess:  First use of double-sided tape to afix a reflector?
			
			
			
				Quote from: gilescooperuk on October 28, 2012, 02:36:54 PM
so it is to do with the mounting method?
Not the method exactly, but yes
			
 
			
			
				Quote from: sixtee5cuda on October 28, 2012, 03:08:14 PM
Does the top, round section spin?
It does not spin, but you're getting closer
			
 
			
			
				Quote from: RayTheRat on October 28, 2012, 03:10:11 PM
Totally off the wall guess:  First use of double-sided tape to afix a reflector?
No, not that
			
 
			
			
				does it use a turbine on the back to rotate the reflector?
			
			
			
				Does it make noise, as well as reflect light?
			
			
			
				Does the reflector part bounce or bobble up and down to get the attention of the driver following you kind of like a wobbly headlight at night on the car next to you that drives you crazy and you wonder why the guy just doesn't fix it because surely he can see his own headlight bouncing all over the place and it must be driving him just as crazy but it goes on and on mile after mile until you have to pull off the highway just to get away from this crazy guy with the bobbly headlight even though it should be him that should pull off to fix that thing?
Ummm...    Is that it?
			
			
			
				Quote from: gilescooperuk on October 28, 2012, 03:15:21 PM
does it use a turbine on the back to rotate the reflector?
No
			
 
			
			
				Quote from: sixtee5cuda on October 28, 2012, 03:44:06 PM
Does it make noise, as well as reflect light?
It may, but that's incidental. 
			
 
			
			
				Quote from: streamliner on October 29, 2012, 01:49:38 AM
Does the reflector part bounce or bobble up and down to get the attention of the driver following you kind of like a wobbly headlight at night on the car next to you that drives you crazy and you wonder why the guy just doesn't fix it because surely he can see his own headlight bouncing all over the place and it must be driving him just as crazy but it goes on and on mile after mile until you have to pull off the highway just to get away from this crazy guy with the bobbly headlight even though it should be him that should pull off to fix that thing?
Ummm...    Is that it?
Seems you found this:
			
 
			
			
				A gimmicky gadget that might work!  Look at how well reflectors on bicycle pedals show up, and flashing bicycle lights (I'm a bit dubious about the front or headlight flashing) plus of course police, ambulances, fire engines and hazard light.
I have to confess I'm a bit paranoid about being seen following an accident I had many years ago back in the days when people drove on sidelights.  It was tipping down with rain and the road was soaking.  In amongst all the reflected lights I just didn't see this car - had the idiot been driving on dipped lights I would have seen him   :censored:.  My beloved Mini, my first car,  had to be consigned to the scrapyard.  :sigh: :(
			
			
			
				Arghhhh!!   :doh: