Tim Wescott wrote:

The alternatives are to buy a bunch of ballasts and continue to mess with
fluorescents (and tubes that are now considered toxic waste, omigod), or
mount light sockets onto 2x6's and put in screw-in LED bulbs (which is
about $50 per fixture cheaper for the same light, but labor-intensive).

Can you get good (high efficiency) ballasts to fit the existing fixtures?
A modern ballast should run dead cold and last longer than you're apt to
care. If it's high frequency the lamp will last longer than with a 60 Hz
ballast as well.

As other have noted, a very low failure rate with LEDs negates all savings
unless they come with free replacement essentially forever.

bob prohaska