I have to agree with ultramag on the halo shield. It keeps unwanted light off anything close to me like my partner, a hedgerow or whatever as I'm turning my head to scan. I believe it also has little or no effect on down range effectiveness of the light I'm using, those are just my opinions and the way I hunt.
I'm a little confused by RIEDs capitalization, not sure the points he's trying to make, he's only shown me opinions and has done nothing to substantiate his claims. I do commend him on his toilet paper role and electrical tape engineering job, who would have thought of that.