Seems the author of 50 shades has a lighting fetish.  If you haven't read any of the books, check out these excerpts from the original:

'Once underneath the dark, cold concrete of the garage with its bleak fluorescent light, I lean against the wall and put my head in my hands. What was I thinking?' -- page 50

'Fluorescents ping and buzz in sequence as harsh white light floods the large wooden building. From my upside-down view, I can see an impressive cruiser in the dock floating gently on the dark water, but I only get a brief look before he’s carrying me up some wooden stairs to the room above. He pauses at the doorway and flips another switch – halogens, this time, that are softer, on a dimmer – and we’re in an attic room.’ -- page 347

‘I’m running through dark places with eerie strip lighting, and I don’t know if I’m running towards something or away from it… It’s just not clear.’ -- page 53

‘Moving smoothly through the crowd, his hair glints burnished copper and red under the recessed halogen.’ -- page 418

‘I hate energy-saving bulbs – they are so dim – but being naked here, with Christian, I’m grateful for the muted light.’ -- Fifty Shades Darker, page 76

‘He sits naked, his body bathed in warm light cast by a solitary freestanding lamp beside the piano. With the rest of the room in darkness, it’s like he’s in his own isolated little pool of light, untouchable… lonely, in a bubble.’ -- page 122

Good to see its not just lighting designers who become obsessed (with light, I mean!).