T.D.
My son had a sleep study a few months ago. The arrival time was for 8:00. My husband went with him so I am relaying the info that was told to me. Thye got started right away putting the the "wires" on him but it took almost 2 hours. Then they weren't actually ready for lights out for another half hour.
My son was very cooperative so the process went "quickly" compared to others. They were both exhausted by the time they finished. There was a tv and dvd player and it was encouraged to bring a movie and books. My husband and son did not need any of that but I imagine there are plenty of people that don't go right to sleep.
BTW - my husband sent me a picture after the son was all hooked up. I was SHOCKED at how many wires were all over my son. I can't believe anyone can sleep at all with them on.
Good luck!