Bests & Worsts Reviews from Amazon

INITIAL REVIEW: I bought a 4-pak after reading all the glowing reviews from people who “received these promotional items for unbiased reviews” (yeah, sure). I tested them by leaving them in full sunshine for an entire day and turning them on with the supplied pin. I tested these in my darkened basement. To aid in testing, I numbered each individual unit as 1 through 4. Right away, #1 and #2 were the standout students, detecting motion flawlessly and stayed lit for 30 secs each occasion. #3 appeared to be DOA (unresponsive with the pin poke). #4 detected motion but only stayed lit for 5 seconds before going dark. After an hour, I decided to perform the test again. #1 worked well every other time. #2 decided to quit working altogether. #3 that was DOA before, all of a sudden came to life, detecting motion but stayed lit for 60 sec each time. #4 only detected motion if I was 12 inches away from it and only stayed lit for 5 seconds. My conclusion: these lights are total garbage and buying them is like rolling dice. Don’t do it. I’m returning them to Amazon. What a waste of my time!!! UPDATE 6/1/2016: I have to give credit where credit is due to Coco-Vision. After my initial negative review, Coco-Vision proactively sought me out and offered to send me a whole new 4-pack of these lights, guaranteed to work. I received the replacement lights promptly and proceeded to test them the same way I did with my original lights. This time around, all 4 lights worked perfectly. Each one sensed motion at about 10ft away and stayed lit for approximately 30 sec … over and over. They passed my test with flying colors and are mounted around my house right now. So I have adjusted my rating from 1 star to 5 star … with a caveat. The caveat is that these replacement lights were hand-picked for me by Coco-Vision. So, I recommend that you buy these lights but do test them rigorously and contact Coco-Vision if there’s any problem. Coco-Vision seems to be a legitimate company who is aware of its online reputation here at Amazon and are responsive to the customers.