Review of LED Keeper

On Tuesday I reviewed LED Christmas lighting and found that it’s lacking in some major areas. Normally I don’t post two reviews in a single week, but this week is different because this review is about a product that can help mitigate the repair issue with those lights. The LED Keeper helps you find and repair problems with LED Christmas lighting sets, even if the set is supposedly not repairable. Now that I know how to use the product, I wouldn’t be without it. The company also produces a tool named Lightkeeper Pro for incandescent light sets. Both products make finding and repairing bad bulbs a lot easier.

The LED Keeper works by passing a current through the light set at the point where a failure occurs. The device actually pierces the insulation and injects a 9 volt signal through the line to help you locate the bad bulb. You use clips to help you keep track of how the bulbs light. It actually doesn’t take many tries to locate the bad bulb. The best way to see how this product works is to view the instructional video.

You should note a few things about this tool. First, you need to untwist the wires in order to clip onto the wire that holds the bulb you want to check. The video doesn’t make this very clear.

Second, I found the tool cumbersome to use with the lights in place. Yes, I eventually got it to work, but the best policy seems to be to wait until you take the lights down at the end of the season and perform the required repairs then, when you can work at a table or other easily accessed surface.

Third, you only get two replacement pods. You use a pod to replace a non-replaceable bulb—one that has been glued in place. The pods are what makes it possible to turn an unrepairable LED light set that you’d normally need to throw out into something you can salvage. Fortunately, it’s possible to buy additional pods in sets of four. However, I had to contact the company to find this information out because it isn’t mentioned anywhere on the packaging or as part of the instructional video.

These few problems aside, I found the LED Keeper worked extremely well. I tested it on three damaged light sets and it repaired them all. Given that LED Christmas tree light sets are a bit on the expensive side, having this tool could save you a lot of money. The part I like best about this product is that you don’t have to be an electrical engineer to use it. Yes, you do need to be handy, but most people who can handle a pliers without problem could easily use this product as well.

 

Review of LED Christmas Lights

I’m always looking for ways to make self-sufficiency pay. One of those methods is to do more with less. In my CFLs for Free post, I described how you could purchase just one Compact Fluorescent Light (CFL) and eventually obtain a house full of them (using the money saved to buy new bulbs) that would end up saving you a lot of money. Thinking carefully about new technologies and how they can make you more self-sufficient is a good way to keep more money in your pocket.

Not all new technologies end up saving you money. The Light Emitting Diode (LED) is one of them. Yes, the new flashlights are fantastic and I absolutely love the one I own. It puts out an immense amount of light seemingly forever on a single change of batteries. However, LED Christmas tree lights are another story. It would initially appear that they’d be a winner. Their life expectancy is supposedly much longer than standard bulbs and an entire 200 light string consumes a miserly 9 watts when you buy one of the nicer sets. In addition, the light they produce is vibrant.

Unfortunately, the longevity of LED Christmas lights is a problem. Out of eight test sets I initially purchased for testing, one set is completely dark and two others have dark segments in just one year of use. Of course, the problem is likely with just one bulb in each darkened segment. However, this is where the another problem occurs, the bulbs are glued into place and you can’t change them. (A few newer sets do include replaceable bulbs, but each vendor appears to have a different socket scheme so the bulbs from one vendor aren’t interchangeable with those of another vendor.) However, whenever you can get them, get the sets with replaceable bulbs.

Having read the vendor documentation carefully, I had anticipated a problem or two. The first thing you need to know is that the vendor is misleading you about the longevity. The sets I reviewed specified bulb life between 25,000 and 100,000 hours. The term you need to know here is Mean Time Between Failures (MTBF). MTBF is a statistical measure that doesn’t really tell you anything unless you know how to apply it. An MTBF of 25,000 hours means that half of the bulbs will last that long and the other half will last longer. There is an actual mathematical probability curve that specifies bulb reliability, with higher failure rates at the beginning and end of the curve and a relatively stable period between (called a bathtub curve). You also need to consider what MTBF infers. The vendor is telling you the life expectancy of any given bulb. In order to find the bulb life expectancy of the light set, you divide the individual bulb life by the number of bulbs in the set. A 200 light set that has bulbs with an MTBF of 100,000 will, on average, deliver only 500 hours of light without failure. If you’re like most people who turn their lights on at 6 pm and turn them off at 11 pm, the set will last, on average, 83 days or about 3 years. As a consequence, it doesn’t surprise me that three out of eight light sets have problems.

The second thing you need to know is that LED lights are polarized and of different characteristics. If you’re used to working with miniature incandescent sets with replaceable bulbs, you know you can slip a bulb out of a non-conforming holder and put it into a conforming holder without problem as long as the bulb is of the right type for the number of lights in the set. In addition, it doesn’t truly matter how you insert the incandescent bulb as long as the two leads stick out appropriately. Not so with LED bulbs. It’s possible to put them into the holder backward because there is a positive and negative end. In addition, a check of those replaceable bulbs show that some have resisters attached to the bulbs and others don’t. In other words, you must get the replacement bulbs for your set from the vendor who produced your light set. The addition of replaceable bulbs is a good step forward in LED technology, but things are still too complicated for most people to handle.

There is actually a way around these repair issues and that you can salvage your LED Christmas lights when they fail. On Thursday I plan to review LED Keeper, a product I found for fixing problem light sets. The solution isn’t perfect and it does require some electrical knowledge on the part of the user, but it actually works quite well. I managed to salvage my failed light sets using this tool.

The third thing you need to know is that LED Christmas lights won’t actually save you any money unless you can buy them on sale. The problem is the high initial cost of the light set and the small amount of time you use them. The cost of running a 50 light incandescent set 6 hours per day for the 30 days that most people use them is ((20.4 watts * 6 hours/day * 30 days) / 1000) * Your Electrical Rate ($0.111362/Kwh in my case) or about $0.41. The cost of running a comparable 50 light LED set is ((4.8 watts * 6 hours/day * 30 days) / 1000) * 0.111362/Kwh or about $0.10. The savings of $0.31 per year isn’t very large when you consider the difference in light set cost of about $21.00. The lights would have to work for 68 years to pay back your investment. In order to make LED Christmas lights work as an investment, you have to buy them on sale. However, you might simply like the fact that they produce such vivid colors that the cost differential isn’t a concern.

Overall, I can’t recommend LED Christmas lights as they currently exist. The vendors aren’t being honest about how long they last, most sets are impossible to repair, and even when the set is repairable, the replacement lights aren’t standardized. Adding insult to injury, you’re paying a much higher price for these sets. LED Christmas lights are getting closer to being a bargain each year though and it’s likely that most people will be able to start benefiting from them in a few more years.