Well, I doubt that the collar will work.. even though it would be nice for other purposes. I'm thinking if a dog accidentally gets lose in the dark, then you can still see where it is. And just basically as a nice way to make sure that cars notice you and so on.

But the reason I think it would work to find poop, is because if I think about how Taggart acts when it comes to that. Usually it's like; get business done, wipe paws and then quickly march on. So any kind of light which that collar would provide would be long gone after the pooch has done its business so it's not going to help much with finding any left overs, heh.

As for the other one... It basically just seems like a fancy flash-light and since you already tried that, I doubt this one will make much of a difference.

I don't really have this problem myself to be honest, since first of all I only have one dog, so that makes it a lot easier for me.
And also Taggart deserves praise since he usually goes in the same area every time and that area is well lit at night... AND it's also very conveniently close to a garbage container, so for that he gets an extra plus, hehe


Edit: I just realised that the first one wasn't a collar at all but a headlamp. Silly me!

That does definitely seem handy though. You have your hands free and you shine the light where ever it is your looking, so that should definitely be helpful for finding hidden things in the grass. I say give it a go!