I remember a few members talking them up at the begining of the season. Don't recall hearing much since then.
I imagine they work about as well without the light as they do with the light, but I don't know for sure and never will.
The whole "have you ever seen a cat chase a laser light?" line of thought makes me laugh. ;D Yeah, my cats will chase a laser light, they'll also chase a paper ball, a feather, a piece of string, anything that is prey-sized and moves. Just like a bass.