That's because it's brand new. You're able to cut it down to suit your needs. It allows the user to get the light flush to the front or rear window and eliminate the majority of the flashback.
There was a thread on an old version of the site where someone somehow mirrored the inside of one of these (after cut-down). I'll see if the pics are in any of my folders still.
As the other member already noted, yes, just one bulb. Other colors are available though I do not have any currently.
