Making my outdoor light safe overnight
Replace the Fixture
I know that isn't what you want to hear. I had a fixture sort of like this (actually a 2-bulb fixture). Bulbs burnt out frequently due to vibration (door right below). I replaced it with a fluorescent fixture (different type of bulb - i.e., not Edison base). A few years later when that burnt out, I replaced with an LED fixture (integrated LEDs, not a &quot;bulb&quot;).
The cost is a more than a bulb, but you:

Avoid vibration issues affecting the bulb/socket.
Can get (typically) more light than with an enclosed &quot;ordinary&quot; LED bulb because instead of having to get a bulb that fits the maximum rating for an enclosed fixture, you get a fixture designed to produce the desired amount of light.
Save energy compared to fluorescent (though admittedly LED bulbs would provide similar savings).

Replacement should be straightforward, as long as the existing fixture was mounted correctly on a junction box and not just screwed to the wall around a big hole.