PARMIDA 20-Pack 4FT LED T8 Ballast Bypass Type B Light Tube, 18W, UL-Listed for Single-Ended & Dual-Ended Connection, 2200lm, Frosted Lens, T8 T10 T12, UL, FCC - 5000K

Easy install, bypassed old defective ballast, required only two LEDs verse 4 fluorescent bulbs. Cut off old ballast wiring just required 4 new wire nuts, not supplied.

Inexpensive compared to similar type bulbs on Amazon. Accurate color description and no flickering. These are not plug and play bulbs that you can simply put into your existing florescent bulb light fixtures. These require some minor electrical work to remove your fluorescent ballasts and some minor re-wiring of your fluorescent light fixture. If you can manage the little bit of electrical work, these are great bulbs that work as advertised at a decent price.So far, no issues with ambient weather and durability in a non-heated garage that gets below freezing temps.

Once I figured out how to change the tombstones, the installation went smoothly and the bulbs worked perfectly.

These T8 fluorescent replacement tubes are a solid upgrade if you're ready to ditch old, flickering fluorescents. The ballast bypass method was clearly explained in the instructions, and once I removed the ballast and wired everything directly, the installation went smoothly. It's definitely a project for someone comfortable with a bit of DIY wiring, but the long-term savings on energy and maintenance make it absolutely worth it.These LED tubes are super bright—the 2200 lumens really light up the warehouse without that harsh, flickery feel of traditional tubes. At just 18W, they’re far more energy efficient, and I’m already seeing a drop in my electricity usage. I also appreciate that they work with the original tombstones, which saved me from having to retrofit the fixtures.One thing to note: the fit is very snug in the fixture. That’s great once they’re in place—no rattling or sagging—but getting them in took a bit of extra care and pressure. It’s not a deal-breaker, just something to be aware of if your fixture is older or has slightly worn sockets.Overall, I’m happy with the quality, brightness, and peace of mind knowing they’re UL-listed, RoHS compliant, and FCC certified. Plus, the 5-year warranty adds even more confidence. I’d absolutely recommend these if you’re ready to bypass the ballast and want a reliable, energy-saving lighting solution—with a little patience for the snug fit.

Finally some florescent light fixture replacement bulbs that are affordable and offer you more than one wiring option. The fixtures in my basement shop are all 4 tube fixtures with ballasts. One of them went bad and the other two had bulbs that needed replaced. I had the florescent bulbs because they are so easy to break and they don't always last that long. The humming of the transformers after 20 plus years was also a nuisance!! I was looking for the best affordable solution. Parmida LED tubes are the answer!!! You can use your existing fixture and order the type of tube that you need. In my case, I wanted to get rid of the ballasts that rob you of electricity and cost you money, so I did not want the direct replacement tubes. Instead get these tubes. They take a little bit of work but do not let other reviews make you think that you have to be an engineer to replace these in your current fixture. The first one took me about 30 minutes because I pulled everything out of the overhead. The second and third ones took me about 10 minutes each. Since you can power these tube from one end only or from both ends, I chose to power from one end only. All you need is a meter, side cutters, a wire stripper, black tape, a black marker, and a step stool. I removed the old bulbs and exposed the ballasts and wires. I removed the wire nuts from the incoming power to remove the wires to the ballasts. I put the wire caps back on the exposed incoming power wires. Then I used the side cutters to cut the wires to the tube power strip on the right, leaving them long enough to reach the incoming power lines. Then I cut the wires to the tube power strip very short and taped them so they could not touch anything. They I removed the transformers and discarded them. Next I used the meter to determine which wire on the right power strip would connect to the left post of the LED tube. I used the black maker to mark these wires, 4 of them. I stripped these wires back about an inch and twisted them. The remaining 4 wires, were stripped and twisted the same. I then used the meter to test that all the wires in the bundles were on the left post for the black marked wires and on the right post for the unmarked wires. I attached the black marked wires to the load power wire on the fixture's incoming power with the wire nut, and the unmarked wires to the common wire on the incoming power with the wire nut. Last I put the LED tubes in the fixture, closed up the cover and turned on the power!!! What a great improvement in lighting!!!!

Had a basement and garage full of noisy/erratic starting florescent lights with ballasts. When I looked to upgrade, ballast free (Type B) was the choice for me. This meant a slight rewiring of the light fixtures to connect 110 directly between the two pins on the ends of the tube and (optional) removing ballast physically from the light. After first fixture was converted, I struggled a bit to get the new LED tube into the sockets. Hmm. When I checked length of LED tubes against old tubes they are slightly longer(1/4"). This made it tough to install bulbs working overhead. For the balance of fixtures , I removed the entire fixture and bench installed the tubes, and then put the whole thing back up in the ceiling. Much easier to install the bulbs. In the end...very pleased with brightness, light color, overall cost, and no more hum! Additionally, my twin florescent 40W tubes (with ballast) were probably drawing close to 100 watts. Now with twin LED tubes...less than 40 Watts TOTAL and brighter light than before.