That was on the first artificial lighting challenge this one never had one. At least I never saw one. I hope voters won't mark down for that. As long as artificial lighting was used to capture the shot there should be no penalty.
I don't know I haven't looked closely at them all. Seems like from a quick glance most are pretty obvious with the light in the shot, others are obviously studio shots beyond that I guess you will have to use your best judgement.
