[Since the LEDs don't need the ballast, I wonder if these work with a bad ballast?]
GdB:
I'm not an electrician, but I watched the install over my desk at work. It took less than 10 minutes. Remove old bulbs, remove ballast cover, cut all wires off ballast and throw ballast away. Only one end of LED bulb gets power, so identify the power feed bulb holder and use it. Cut wires off the other end bulb holder. Put ballast cover back in place. Install bulbs. Prepare to be amazed at the increased light level using ~ half the power of the old bulbs.
BTW, this description should not be used to install your own if you aren't comfortable with doing this kind of work.
