Excellent size for a 550 lm bulb. These bulbs are bright and fit the fixture which requires a relatively short bulb.
Can't rate the longevity yet. Life span seems like it’s half of other leds, 25000 vs 50000 hrs. Despite all that, they seem to work well. Needless to say.
Cool bright light and dims nicely. The bulbs are clean, crisp and very bright.