This appears to be a specialized product and matching receptacle. I'd rather see some sort of locking receptacle (either a standard configuration or a custom design).
What's wrong with a couple of AA batteries and an efficient LED? Use several LEDs with a simple control circuit to provide a fake flicker effect. This product seems like a "solution looking for a problem."
I have seen receptacles on top of the knwell (sp) post on a bannister that were face up to hold the stair light. I think they were popular in about 1920. I always see the receptacle , but have yet to find one of the fixtures.
Thats a neat idea I will give them that BUT if my eyes are not mistaking me, that receptacle is flush and on a window ledge? I can see someone placing a houseplant up there and overwatering (overflowing) the plant... You guessed it the receptacle is going to double as a drain! A.D
Rewired, I was waiting for someone to bring that up....
The receptacle is UL listed, as long as it's not a 'wet' location. This got me wondering .... windows open, and you don't always remember to close them .... is a windosill a 'wet' location?
And, BTW, that is a 'standard' receptacle, rated for 15a/125v.
Last, but not least ... assume a kitchen window, above/behind the sink, with these receptacles controlled with a light switch. Perhaps I am wrong, but these would not be required to be GFCI protected, as a) it's not a laundry sink and b) it's not one of the countertop small appliance circuits.