If you are shopping for security lights, barn lights or other “dusk til dawn” lights, you must at all costs avoid fixtures with this bulb in it. There is maybe only one manufacturer of this bulb, Utilitech and they straight up suck.
Why do they suck? Because the tubes are glued into a ceramic base and the adhesion lasts just about as long as the career of a blind outfielder in MLB.
Do yourself a favor and buy a quality LED lamp such as the ones made by Simkar or another commercial grade manufacturer.