I recently wrote an article for TED Magazine about extended-life linear 4-ft. fluorescent T8 lamps. Industry averages: * 20,000 hours at 3 hours/start on instant-start ballast (the most commonly installed electronic ballast) * 24,000 hours at 12 hours/start on instant-start ballast * 24,000 hours at 3 hours/start on a programmed-start ballast * 30,000 hours at [...]