To me personally, whenever I've been on the TTA it's always easy to see SM. There's a little screen over it? Amazing pictures btw!
The only time I've ever been on a ride and officially the lights going on was Spaceship Earth. It was a clear definition of the reasoning behind the "dark ride". In the position I was stuck in you could see everything and then we finished the ride that way. My friend was bummed, but I thought it was amazing.