They peoberbly were there. Did you see a white strip of plastic looking stuff running all the way down the one (or both) side/s of the aisle?? If so this was the floor lighting. It works the same as a watch with those (forgot the name) glow in the dark hands. Shine lots of light on them and as soon as it goes dark, they light up.
Allthough Im sure some arrogant, big headed, know it all will correct me.