DALL-E is still highly probabilistic in its judgement. For instance, in this article, it keeps putting "fire" in the the background on something that is likely to be on fire, rather than lighting up the person.

I have a similar experience. In my own experiment, I can't get DALL-E to turn off the street lamp at a bus stop in the darkness. I've tried "no light", "broken street lamp", etc.; no use. Any mention of "street lamp", the scene will include a working street lamp.

It's just more probable that a scene with a lamp in the darkness must have that lamp providing light, and this is something that DALL-E will not break out of.