In story, it would make sense for there to be no artificial lights in the raptor pen. It’s still supposed to mimic a real, natural location for the animals. It’s a zoo.
That means, story-wise, the only way to have lights in the pens are something akin to flashlights. Over-the-shoulder light packs accomplish that while being canonical to In-Gen technology.
That, it will look amazing with streaks of light flashing through a pitch black raptor pen for night rides.