Bests & Worsts Reviews from Amazon

Just repaired 8 strings of GE lights that I thought were goners. Some strings had a bad section, some strings only had a short good section. Looked like a nightmare, but wifey said, "Let's at least try that tool." Fair enough. Plug a set into an outlet. Mark the start point and end point of the section that won't light. Unplug from wall and plug into the tool. Now, let's say you identified a dark section of 30 lights. Go to the 15th light and squeeze the tester on the wire to that light. In most cases, either lights 1-15 will light, or lights 16 through 30 will light. Let's say lights 1-15 light up. Excellent. Now you KNOW that your naughty LED is hiding among lights 16-30. Time to test again. Where? Split the difference: which in this hypothetical scenario would be around light 23. Squeeze the tester on the wire going into light 23 and... the lights before it or the lights after it will light up! Aha. So your naughty light is hiding among the dark lights... and all you need to do is keep narrowing it down until you hit it. Sometimes you find it quickly, sometimes it takes a little longer. Some of the strings I fixed had 4 or 5 bad lights - which meant doing this process several times, each time on a different section. But I look at it this way: $30 for a tool that just saved me 8x$20=$160 worth of lights. NOTE!! What does a "GOOD" light look like vs a "BAD" light? The bad bulb often (not always) has a bad wire on it. To help give you and idea what I mean, take a look at the pictures: One of the wires has burned off of the bad LED. Compare that to the good LED in the other picture: two wires, both intact. Every once in a while (1 out of 15 in my case) you will find a bad LED that looks perfectly good. Fortunately, the tool has a little socket on it so you can test 'good looking' bulbs.