I was lucky enough to be invited to the preview on Monday and rode 3x's (twice as left pilot and once as right pilot)... its not that dark in the cabin.
BTW - it is such a fun ride; and more fun if you have an active and engaged group. On our second ride, we had a team that was really engaged and helping each other out (cheering for each other)...
Also, the queue is as awesome as the ride is... walking behind the falcon, looking at all the details (e.g. burn marks, blaster holes, dents, etc), When you enter the mechanics room it smells like a mechanics shop and the Hondo animatronic is so seamless. "Walking" into the falcon is surreal... the chest room is well done and the ****-pit, is the MF's cockpit (minus the buttons on the ceiling)...