We moved into this house (rented) 6 months ago. When we first moved in, I got a bit freaked out, noticing a light coming through the spotlight in DD's room, when the light was off. DH absolutely adamant that it was light reflecting from the room (despite it being pitch black).
I was in there earlier, and thinking about the light thing, and asked DH if the landlord, who had inspected recently, seemed more interested in that room (had all kinds of drug-growing conspiracy suspicions up my sleeve).
DH thinks I'm being an idiot. He tells me all this nonsense about that kind of light fitting being designed to absorb lights in the day and shine at night - despite only 1 of the 4 in the room doing this. He then told me about light pollution shining up through the top of the curtains/blackout blinds and onto this one particular light...
I disagreed. We had a bit of a light-hearted argument about it, when he decided to open the loft hatch and show me that there was no bloody light.
Of course, there was.
Odd thing is, there is no switch to turn it off anywhere...