My apartment faces kind of southeast -- more east than south.
In the winter, there is significantly less sunlight than in spring/summer.
The Queen seems to live on sunlight (and a significant amount of food). She can find the sunny spot whenever it happens, but in Spring/Summer they are easier to find and more rewarding.
The Minion is all black -- so the sun warms him considerably -- although, we got him in November, so I don't know how he reacts to sunlight. I suspect that, like other demons, he prefers the dark--- but, he may be solar powered and simply get "more active" on sunny days.... I'll let you know.