I'm just full of ideas lately

I was thinking about people who find themselves in a situation where they cannot replace an outdoor light fixture (for whatever reason) with one containing a motion sensor. I have just such a situation at my back door because the fixture is recessed into the ceiling.

I realize that they make sensor adaptors that screw into the socket, which you then insert the bulb into. But in some installations, even this solution doesn't work. It occurs to me that somebody needs to invent an outdoor flood light bulb with a built-in sensor. Wouldn't that be a great idea?

Oh look! Somebody does make one.