Lithonia F20T12 strip light

The GE lamp shown here is my first F20T12 lamp, bought in 1996 and used in my bedroom for a few years before I moved out. I put it back into service some years later in this newer Lithonia fixture mounted vertically in my garage. This is the "nighttime" lamp that usually stays on from the time I get home until the time I go to bed, partly as a longevity test and also so I have enough light in the garage for momentary trips, without having to turn on any of the bigger lights. This is also why it has a manual-reset starter in it (which also tends to start the lamp with a long preheat and no blinking). At this point, the lamp has about 15,000 hours on it.