This ballast was used in an inexpensive repair to an existing four-bulb fluorescent light fixture. Rather than replacing the tombstones and re-wiring the fixture to accept direct-wire T8 LED bulbs, I decided to simply replace the ballast and the bulbs in the fixture. The fixture is in my basement hobby room. Re-wiring it and getting new tombstones (the unshunted kind you need for direct-wire LED bulbs) would have cost about the same and would have been more hassle. The whole job, from start to finish, took about 30 minutes. No muss no fuss. This electronic, "instant start" ballast works just fine with the Amazon Basics T8 LED bulbs. Happy.