I've replaced fluorescent tubes from the borgs with LEDs. Doing so fixed ballast problems - I ripped the ballast and most of the wire out of the fixture. The LEDs I bought are powered from one end, the other tombstones are just to hold the tubes. Instant on, no color change with tube warm-up. My fluorescents had pretty short lifespans, I think in part due to frequent power cycling. I know fluorescents don't use much power and we should just leave them on even when we're not in the room but old habits die hard. Power cycling is not supposed to affect LEDs or so they say.