I've flown this plane a few times now. I think only once the flight attendants actually used the lighting schemes that come programmed. The other times they just had white lights on at boarding, and turned the whole thing off because they couldn't seem to figure it out. It really is very easy. For instance, the blue lighting is the "Cruise" lighting. The orange is "Sunrise/Sunset" To get it to work you touch the "Cruise" button. Then the "Both Zones" button. Not too hard huh? But most DL FA's can't seem to figure that out. Not trying to be a jerk, but just noticing my experience with DL FAs and technology.