Unless, as in this case, the light bulbs would interfere with the layout of the text and distract for the focus which is the girl behind the curtain. This is the beginning of the end. Photography becomes used more and more for cover art. What cover art is being done by artist is being pasteurized and hurried. Artists stop going for the lurid and settle for just the bodacious.
Realism gives way over to the less time consuming stylization.
And finally Politically Correct Police win the day and lucidity on paperback covers are reduced down to the glossy clean clothed in bright happy colors Fabio, neck nuzzling some would be super-model. It's enough to make you weep. But to her closest friend, beauty brought tragic death. So at the peak of her career, Selina suddenly found herself terrified of wholesome affection, convinced it could lead only to disaster. Trusting no one, even herself, deliberately she slipped into that demi-world backstage where mend do not love in the accepted sense, where women have abandoned conventional romance.