A light in my garage went out, and this fixture was cheaper than replacing the ballast in the existing fixture. I thought, "how bad can it be?" Answer is . . . pretty bad. Very cheap construction and the parts did not fit together particularly well. No instructions were provided, but having done this several times that was not a real problem for me. The metal bends VERY easily, so be careful when installing it.That being said, it does work, and so far no annoying hum.If you want the cheapest alternative, this will work, but I would suggest spending a few dollars more (maybe $5) and getting something a bit better made. Halfway through installation, I considered replacing the ballast in the old fixture rather than installing this mess, but I was too lazy to deal with the delay and returning this fixture.