Shutter Speed aka (exposure time) , stands for the length of time a camera shutter is open to expose light into the camera sensor - is one of the three pillars of photography, the other two being ISO and Aperture
Experimenting with the shutter speed is the best way to determine the correct shutter/aperture combination for your situation. In this case, the version doesn't imply enough motion to be effective; the & versions are better.
This charts show the effect of aperture on the size of the starbursts. As you can see, the smaller the aperture, the more emphasized the starburst. The same concepts apply during the daytime as they do during the night time.