Robertson IEA432T8120N (3P20135) Electronic Fluorescent Ballast, for 3 or 4 T8 Fluorescent lamps between 17W-32W (F17T8 through F32T8) or 3 F40T8 Lamps, Instant Start, 120V (Qty 1)

I ordered this ballast for a standard T8 (1" diameter lamps) fluorescent fixture that didn't work. None of the bulbs showed any sign of life but I had input voltage. Replacing the ballast was easy. Turn off the breaker or switch to the fixture. Disconnect the input wires (black and white) and cut the rest of the wires near the ballast. Remove the old ballast and connect the red, blue, and yellow wires using wire nuts designed for 16-22 ga. wire (usually colored blue and not included). The wires are solid and need to be pretwisted before putting on the wire nut which can done with any pliers. The wire nut alone will not properly connect the wires. There is no polarity for the colors and can be connected either way as long as the colors match. Now hook up the supply lines and reassemble.

Well, I have a 4 tube light in the kitchen. I'm installing replacement doors on the cabinets, and one morning the light didn't come on. I need to see what I'm doing. Pulled the light switch and it was good. Put my meter leads in the old wire nuts in the light fixture and it was getting power. I immediately ordered this replacement. It came fairly quickly. Easy install: the base/mounting fit the mounting points in the light housing in the same position. The lines were more than long enough, in fact I had to trim them down to fit just right. Light works fine now. Don't hear any noise from the transformer/ballast. Also a lot cheaper than the other options. Got no complaints.

I’ve been using these Robertson IEA432T8120N ballasts since seven years ago. Made 3 separate orders over that time, and all 8 of the originals are still in use—now 9 with the latest order. Reliable, easy to install, and keeps my T8s running bright with zero fuss.

I have purchased these ballasts twice. I had no trouble with my first one, and it worked beautifully. However my most recent one completely failed shortly after the 30-day return window closed. [UPDATE: Robertson's customer service was excellent, and they refunded my money even though it was past the Amazon return window, so I've change my review to 4 stars since my first ballast had no issues.] When I first installed it, I also installed 4 brand new somewhat pricey Sylvania 32W T8 high CRI fluorescent blubs because my old bulbs were pretty dark on the ends. The install went fine, and the light worked, but I could see flickering and visible ripples in all 4 bulbs. I thought it might just need some hours on the bulbs, so I left it on for a few days, and didn't think much more of it. There was still some flicker, but it seemed better. Fast-forward to yesterday, when I flipped on the switch, and nothing happened. I checked the breaker, and checked for 120V at the fixture, and can definitely see power there -- it's just completely dead, with no sign of even trying to light any of the bulbs. So now I'm left with another dead ballast, and need to find an alternative to Amazon's recommendation.

Great product at a really good price. If you are using this electronic ballast to replace dual magnetic ballasts in a 4-Light fixture prepare yourself to completely re-wire the light fixture. Not particularly difficult if you follow the wiring diagram supplied with the ballast, but tedious none the less. You have to access and re wire the individual lamp sockets, as the white leads are not brought out and accessible in many of the old 4-light fixtures. May not be for the novice, but the end result is an instant-on fixture with absolutely no flicker.

Easy to install, worked perfectly.

Dis the job at a get price point

Great replacement for my t8 ballast. It fit perfectly and all I had to do was cut the wires from my old unit and use wire nuts to join color to color. As soon as I did this, it turned right on.