Non-Shunted T8 Lamp Holder Tombstone for LED Fluorescent Tube Replacements - Compatible with T8 & T12 Bulbs, Easy Installation for Home, Office & Garage Lighting Upgrades

Hope this review is OK – items very related. I’m an expert now, and probably will never do this modification again, but…1. I decided to replace the existing T-12 fluorescents in my garage (two fixtures each with 2 bulbs, F40s) and T-12 fluorescent in the laundry room (one fixture with 2 bulbs, F34s).2. LEDWholesalers package of 4 Brightest 20 watt 4 Foot T8 T12 LED Tube Lights, 45w Fluorescent Tube Replacement, Warm White, 1920wwx4 was ordered as was LEDWholesalers Non-shunted T8 Lamp holder tombstone for LED fluorescent tube replacements, Package of 12, 1919x12.3. Items came in a couple of days – thanks Amazon – and anguish on connections was resolved after some web reading. I removed/discarded the ballasts and the existing fixture tombstones, and re-wired – needed a couple of pieces about 2 feet long each of white (neutral) and black (line) 18GA wire (use solid copper core, not twisted!) for connection to house wiring.4. NOTE THAT THESE WARM WHITE LED TUBES HAVE CONNECTIONS ON ONLY ONE SIDE. On one side, there is no electrical connection; and on the other side, the two pins are labeled: one is L (for line), and the other is N (for neutral). I just cut new wires, used existing wire nuts, inserted new tombstones, and connected only one side for each bulb, and inserted LED tubes and they worked fine! (Warm white LEDs are brighter than the olderT-12 F40s, though I could imagine others may prefer cooler white LEDs for garage and work areas.) I would do it again, though $19 for a dozen tombstones and $129 for the 4 LED tubes is a steep cost. When the lights are now on, though, it’s only a total of 80 watts for the two fixtures, half of before.5. So, of the 12 tombstones I had, I have 4 left, and discussing with my wife, she prefers a brighter white (as the current fluorescents are) in the laundry room, so I ordered 2 of the LEDWholesalers20 watt LED T8 T10 (I think they mean T12!) Tube for 48” 4FT fluorescent replacement, no ballast, no UV&IR white, 2043WH for $35. each. Again, pretty expensive, but hey I’m on a mission.6. NOTE THAT THESE LED TUBES HAVE DIFFERENT WIRING! I HAVE NO IDEA WHY, BUT WITH THESE, ONE SIDE OF THE TUBE IS LABELED “N” AND THE OTHER SIDE OF THE TUBE IS “L”. This means you must run the line (L) to one side of the tube (either pin on the tombstone) and neutral (N) to the other end of the tube (either pin on the tombstone). Why they wire these differently, I do not undertand. Obviously, I couldn’t just swaps the LED tubes form the laundry room with tubes form one of the garage fixtures (without rewiring).Crazy to me…but maybe LEDWholesalers has a reason. Just thought you should know. Do read the instructions (though they are less than crystal clear), and know that, even with the same supplier, connections can be different.Critically important to my upgrade of old T12 fluorescent tubes to more efficient and brighter LED T8 Tubes (you can see my reviews of various awesome Kobi Electric LEDs), these worked very well. Suggestion, as you plan your Fluorescent Tube to LED Tube conversion, get the required number of these in hand. That will save you some angst during the conversion. More advice: almost all LED Tubes take line voltage, meaning you will be cutting wires at the old ballasts or removing the ballasts if they are leaking or if you just want to. And almost all LED Tubes take power from one end ONLY of the tube, which means, you likely will need to replace your lamp holders ONLY on one end of the fixture that holds the Tubes. Likely, you will simply need to cut the wires to the other lamp holders and use them only as un-wired "clamps" to hold the Tubes. Said another way, you do not need Non-Shunted lamp holders for the end of the Fixtures that will hold the Non-Powered end of the LED Tubes. More detail is included with my review of the Kobi Electric LED Tubes, and you can find the important Map Key to the Ins and Outs of these tombstones here: The Kobi instructions show the Ins and Outs of the separately available Line/Black and Neutral/White on non-shunted tombstones very clearly here: https://www.1000bulbs.com/pdf/kobi-ledt8f4180041nb-installation.pdf . High Quality NonShunted Tombstones are available through Amazon here: http://smile.amazon.com/LEDwholesalers-Non-Shunted-tombstone-fluorescent-replacements/dp/B00DZIGJX6/ref=sr_1_fkmr0_1?ie=UTF8&qid=1406512065&sr=8-1-fkmr0&keywords=t+nonsunsted+tombstones. Hope this helps make your conversion more efficient. Plan your project well, and You can do this!I needed to purchase a non-shunted tombstone for my light fixtures since I was converting to LED bulbs. The new light fixture that I had purchased had shunted tombstones and I could not see a way of removing the shut so I ordered these. Unfortunately, the new tombstones in my new light fixture pop into the fixture and these tombstones do not support that. I was able to use these by drilling a hole and placing a machine screw through the center to hold it in place. However, it is not sturdy (can rotate) and does not do a safe job of keeping the bulb in place.These tombstones would probably work fine in older fixtures if the tombstone twists out of the metal. Check yours before ordering these!!!These seem like decent quality and they have been working well. Be aware that they are shorter than many original tombstones, at least shorter than in the 3 fixtures I have retrofitted so far. They were, however, comfortably long enough in two of the fixtures and just barely with a squeeze long enough in the third. I am going to to also buy some longer tombstones so I have an option of shorter or longer for the rest of my fixtures.Perfect replacement parts for rewiring T8 fluorescent fixtures for non ballast LED bulbs. Package of twelve is enough for three double fixtures. No guesswork, just follow web links for schematics. Use existing wiring in old fixtures for rewiring leads and jumpers. Takes about 5 minutes per fixture. Disconnect power source, replace existing tombstones, no splicing, all terminals are double, push fit. Install LED lamps, reconnect power, and you'll cut your fluorescent load in half. W, and with LEDS, I expect years of service, no more yearly bulb changouts and dark bulb ends.I bought some as spares when I converted my fluorescent lights to led . Had a little trouble getting the wires to lock into the lamp holder However, overall they were fine . Price was a fraction of the home depot cost .When I started the project I was not sure that I would be able to live with one LED tube replacing two fluorescent tubes. Thus I had spares already.