Looking at this photo I can see lots of lights on the fuselage of this MD81. It can't be a reflection, can it?
Why are there so many lights?
On the fuselage, only 3 per side (discounting the red anti-collision which is above/below):
And here they are from an MD-80 flight manual:
I'd say they're reflections. You can see the reflection of a building or something like it on the fuselage, and if you look close enough, you can see the poles of the 2 first lights. Also most of them are at or near the windows' corners. There aren't any housings or mounts to lights on those spots.