PARMIDA 20-Pack 4FT LED T8 Ballast Bypass Type B Light Tube, 18W, UL-Listed for Single-Ended & Dual-Ended Connection, 2200lm, Clear Lens, T8 T10 T12, UL, FCC - 3000K

These are great. They require a bit of wiring modification in an existing fixture, about five minutes of work, then they plug right in. They are a lot brighter than fluorescent tubes; in some fixtures we only needed one LED tube where there had been two fluorescents. The light colour is pleasant, not too blue, not too yellow.To modify the fixture, turn off the power at the breaker, then remove the cover hiding the ballast, and cut all wires connecting to the ballast, remove it and throw it away. In a two-tube fixture, one of the ends will have two of the sockets wired in parallel, with one pair of wires going to the (now discarded) ballast. Connect these wires to the white and black building wiring. Cut the wires off the connectors at the other end. Replace the cover and that's it. The tubes have to be inserted so the end with the electronics and logo is plugged into the end with the power. They will not light up if you put them in the other way around.It is a good idea to have some extra sockets on hand, as they tend to disintegrate if they are really old. Also it is a good idea to wear gloves if the ballasts are really old, as they may have started leaking black oil... that might be PCB-based coolant in a really old ballast, and you do not want that on your skin. I was glad to get those things out of the building!

I am Using these to replace the T12 bulbs where I also need new ballasts. I typically only put in 2 of these instead of the FOUR T12 bulbs in fixtures. This saves me a little time since I had to rewire a ballast anyway, so there's no additional labor to go LED. And , I won't have a ballast fail just after I put in new bulbs, so I am done.I love the color balance of these bulbs in our offices. They have a nice bright touch without being too orange or bluish. I don't know about lifespan yet.

I have been an electrician for 25 years. I love the new LED 4ft tubes. BUT! These 4ft tubes cost me two days in troubleshooting because they were on a shared lighting circuit with other lights. You had to have all the other lights off before you could turn the 4-foot lights in the kitchen on! Don't waste your money and especially do not waste your time so far the best brand I found AND they're dimmable are the toggle brand at Home Depot. They cost twice as much and they're worth 4 times as much. So disappointed with this products, SMH I wasted over 10 hours checking everything else except these LED bulbs. Too bad I bought them a couple months ago thinking to be a good idea to have some on hand. Now I've had them more than 30 days and cannot return them.

These parmida four foot LED light tubes are awesome! I loved my first case of frosted bulbs so much that this is my second case. I went with clear tubes this time so that I could mix them up according to the application. I didn't realize how many fluorescent tubes I had until I started to replace them. Keep in mind these bulbs are in clear tubes! Not frosted! I have purchased both types and it is my experience that the 4000K frosted bulbs should be installed into open fixtures such as shop lights. These clear tube lights should only be installed into fixtures with diffusers. They are very bright! If you install these clear tube bulbs into open shop lights they are so bright your retinas will melt into your head and run out of your nose. I had previously purchased a case of frosted tube bulbs and I installed them everywhere so when I got these clear tube bulbs I went around and replaced the frosted bulbs in the diffused fixtures with these clear ones .Totally amazing but be careful where you put them. like I said I have ordered two cases of these bulbs, frosted and clear. I love them all! If installed into the proper fixtures they are very bright and the color is perfect. 4000 Kelvin is a very middle-of-the-road color that illuminates everything very nicely. You will need to perform a little bit of electrical work removing the ballast and rewiring the tombstones. If you are afraid of this stuff then find a buddy that can do it for you. The wiring diagram is right on the bulb! I love that! No guesswork or having to search the forums for how to wire them up.For example put a pair of these clear tube bulbs into a 2 lamp diffused fluorescent fixture in my walk in closet and it is amazing how they illuminate the colors of the clothes. It makes it super easy to pick out my dapper outfit for the day!My bulbs arrived intact and all of them worked. Thank you Parmida for an amazing product at a great price!