LIGHTKEEPER PRO Plus 100 Bulbs…

This device can help you solve every problem that can happen with strings of miniature bulbs. Our artificial tree is 8ft tall with 1500 bulbs on 15 strings. We bought the tree in 2014 and got the Lightkeeper pro in 2015. Over 8 years we have replaced more than 400 bulbs (20 to 100) bulbs every year, the LightKeeper Pro makes it easy to find the problems. 1. The most common light problem is just that a few bulbs on a string burn out, those are easy to find without any tool. Just replace them right away, if you don't lots of bulbs will start to fail due to the rest on the string getting overloaded, so fix them asap! Sometimes when a replacement bulb doesn't light, you can test the bulb with this tool, to see if its actually ok and you just didn't seat it right. 2. Every year when we take the tree out again, some strings will not light up at all. This often means that a bulb mechanically failed, maybe a filament broke or bulb came out of a socket. You can power the string and use the tool beeping to trace the wire to find where the current flow stops. Then reseat the lamp or bulb or replace the bulbs.3. Sometimes strings don't light because multiple bulbs fail without fusing. You can plug the string into the tool and press the trigger 30 times to zap the failed bulbs to get them to allow current to flow to the rest of the string. Then when you power the string, most of it will light up and you can replace the dead bulbs as usual. We've had our tree a long time, but it takes a couple of hours every year to keep it working. If you don't replace failed bulbs right away, you will drastically shorten the lifespan of the remaining bulbs, and your tree will not last. We would not be able to keep up the tree without the LightKeeper Pro.

I still don't understand how this works, but it does! My tree has built-in lights, and this year when I turned it on, there were three big sections of lights out. I replaced all of the fuses I could find. I carefully replaced every single bulb in one of the sections (about two dozen of them). Didn't help. I was about ready to just throw the whole tree away and buy a new one, but I decided to google for advice first, and found a few people recommending this thing. I watched a youtube video on it, still didn't quite understand how it worked, but ordered it anyway.When it arrived, I removed one of the bulbs in a dead section, plugged this thing in, pulled the trigger, and the whole section immediately lit back up. Tried again with the other two dead sections, same thing. My tree is now working perfectly and it took less than a minute to fix it with this thing. I can't believe how much time I wasted before ordering this.Bonus: it came with 100 replacement lights, so I was also able to find and replace all of the individual burnt-out lights on my tree and now it is truly back to 100%.

I found that the directions are very poor and have been unable to use it until I learn how.

Had a Christmas tree which only the top lights worked on. Bought this tool, followed the instruction 100% and did 30 “pumps” with the guy....and the entire tree became dead!! turned out it killed over 60lightBulbs which I ended up having to replace. The irony is that the light bulb checker worked great to check which lights the gun killed. I would not recommend this tool for anything else then check bulbs...

Just got this today, tried it, and it didn't work for multiple sets of lights. Here's why. I think ALL the bulbs are burnt out, and this device is useless in that scenario. How did this happen? The manufacturer downplays this scenario, but when you have a strand of Christmas lights connected in series (the most common type), and one goes out, even if the shunt works for that burnt bulb, the remaining bulbs see a higher voltage and will burn out more quickly. When the next one burns out, the voltage goes even higher, which shortens the life of the remaining good bulbs even more. This leads to a cascading effect where, eventually, all of the bulbs will burn out completely in rapid succession, not a single good one is left. This device may work in the rare circumstance when you have just one bad bulb in an otherwise good strand and the shunt didn't work properly for that one bulb, but not in the most common case I just described. They sort of admit this on a small white piece of paper that they include with the device (in one short sentence), but, of course, this is not well explained before you buy it. For this reason, it is a waste of money for me, and image for many people in the same circumstance. Save your money and just buy a new strand of lights. I wish I would have realized this before buying, but oh well. The bulb and fuse checker might be moderately useful at some distant point in the future, but as of right now, it will collect dust on the top shelf.

Used this on some old Christmas decorations (15-20 years) that had lighted sections that had stopped working over the years. First, I tried the "trigger pull" method. Yeah, too good to be true. No success for me, although I'm still hoping to find some decoration to use this on and see it work in action for that "aha" moment. That being said, this has a voltage detector for very small voltage amounts, such as Christmas lights. I used this feature on two separate Christmas light sections that had not been working. I moved the voltage detector down the wire and when the beeping stopped, I knew there was an issue with the wiring/bulb. On both attempts, replacing the bulb where the voltage stopped caused the light strand to come back to life. Then it was just a matter of replacing the other "dead" bulbs on the strand to bring the entire strand back to perfect. I purchased the item which came with 100 spare bulbs. So far, all of them have worked for me. So simple to replace just the bulb and reuse the plastic base already on the light strand.

Did nothing for a half string that was out, and correctly identified a dead bulb as dead. Yeah, I knew that. This was zero help to me. Do I want to change a half string of bulbs, no. Can I see the other dead bulbs without this, yes. So really, tell me, what is the point of the device? May try it again tomorrow when I remove the tree to put up a new one with working bulbs. If I get any results beyond what I got today I will update.