I'm just saying that was the reaction I got from that light. Others use the things with great success. Set the beam so it highlights ABOVE your sight though, so just the lower edge of the beam will illuminate the eyes. You really don't want to hit them in the center of the beam (from what I've read).
Also, I'd set up at the edge of cover looking towards where you expect them to come from. Hopefully that includes open ground they'd have to cross. I almost never set up IN thick cover at night. I much rather prefer to see them coming. If there's a wind, watch the downwind side too. If setting up in thicker cover, the 12ga and #4 buck will take a coyote past 50 yards easily. I think I used an elongated full choke. It's worthwhile to pattern your load as some are better than others. Heavishot's dead coyote is supposed to be real good too, and I think they have suggested chokes for that load, but I don't know what it is.
This is just what I've garnered calling here in WI, but by an large my best results have come from no lights, full moon, and a good snow calling at night. Just like any animals, after an extended bad spell of weather the next few decent nights seem to be good calling times. We're just hitting that here in WI, 4 or 5 nights of sub-zero (F) weather is coming to an end. Tomorrow night is suppose to be a low of 16 deg F with a high of 35 on Fri. AND the moon is getting full. I'll be out Thurs. night and possibly Fri night to give it a shot...should be a lot better than last month when Coyboy, Len and I tried it...just too cold (bitterly cold would be a better description).