Its a total guess.I mean most of the production crew if not all, are not on third shift as of right now unless I am mistaken. Meaning most and again if not all who have access to these houses under construction would only be there during day time hours. That makes me think the picture was done during regular business hours. So two quick things that I based my guess on. One being darkness, the Soundstages are really the only houses that have controlled light levels. All the other houses whether it be the queues, tents, or even the parade building leak in light. The other thing in the picture is this is the final product with paint and lighting. Again I think that points to the SS's as those houses have already been under construction for the longest and yes I know they take the longest due to complexity, but to me the lighting and overall tone of the picture just strike me as a SS haunt.
Not a convincing argument but again its just a guess and why I feel that way.