My garage has six fixtures with two T8 bulbs apiece. I think one fixture has a failed ballast, as the bulbs won't light and changing the bulbs has no effect. Is bypassing the ballast and going LED worth it at this point? Generally, I have been underwhelmed by the lifespan of LED bulbs that I have deployed in incandescent fixtures. Upward-facing fixtures have fared better than downward-facing cans, presumably due to better cooling.