...stops my mind from wondering, where it will go? The Illuminated Collar for corvisdog Project is basically complete. At the moment, it is composed of a blue collar with blue LEDs. He looks pretty neat in it. I may add some more at some point. Thanks pericles42. Interestingly enough, the hardest part was drilling holes in the nylon. They make the collars from nylon because they are tear-resistant... which means even when drilling removes a bunch of content, there still may not be a hole when done.