When you say set like regular pavers, are they on a crushed rock base? I assume the "coping" stones are secured to the bond beam with some sort of thinset? You have any pictures during install? How many and what type of lights did you go with? Those stepping stones look awesome, but I can't imagine what a PITA it would be to tile and plaster that narrow gap between them. That's going to be really awesome all lit up at night. (will need pics!)