shutter speeds most likely varied, and the apertures chosen were most likely somewhat large. hard to tell what ISO with pics these small, but since its at night probably 100 or 200.

but if you wanna get this style down you should try experimenting yourself :p

You don’t see it because the long exposure only captures stationary objects (i.e. those that don’t move) but because the bar of light (well, the actual light coming from it) is such a difference from the normal background, that it gets imposed on the film.

Which is to say, if you went through the same semantics without holding a halloween-type light stick but instead, say, a brick, the picture would look the same as if you’d done nothing, i.e. it would just be a picture of a park or a street or whatever.