I got my lights from Amazon the other day. So far this year we have lost over 30 ducks and chickens (and 1 guinea) to predators. I know some people swear by them.. and some people say they are junk.. but this is what we have experienced so far. We had a predator issue as recent as this week.. so it's not like they were here and just moved on. Mom Fox has gotten one bird a night just about every night.. and the raccoons thought my younger birds were a buffet. The new coop isn't done yet.. so a lot of the free range birds were at risk. I only ordered 4 lights since I knew that was the minimum for the area I needed to protect. I also researched the locations and knew how high they needed to be set off the ground for coons and foxes. The lights arrived on Tuesday the 28th. I set them up right after they came. Now I have been "going out on patrol" off and on every night.. so I have seen the predators.. they have seen me.. they were not impressed (even our deer will spend hours people watching for fun). Between Tuesday night and Wednesday night of last week we lost 13 chicks (6 week old birds) Thursday night had coons biting the toes off some orpington chicks through hardware cloth .. and a fox (i believe) got our guinea Friday through Monday we lost a bird every night to predators Tuesday the lights arrived and so did the new live traps... lights were set up and so were the traps Tuesday night 0 losses.. 0 critters in the traps (though we had a lot more deer in the yard checking out the lights.. 8 instead of our normal 4.. guess they thought those low to the ground flashing red lights were kinda cool) Wednesday night 0 losses.. 0 critters in the traps (didnt see any deer last night.. I guess the novelty wore off) Now maybe it was a fluke.. or maybe they do work.. but either way I am not going to complain.. 0 losses works for me regardless of the "why" I will continue to set out the traps every night with fresh bait and every few weeks I will move the lights around to see if it makes a difference.