Spot lights and followspots for Weddings
A followspot is a powerful stage lighting instrument which projects a focused bright beam of light onto a performance space. Followspots are controlled by a followspot operator who tracks actors around the stage. [replace actors with wedding couple and stage with dance floor!]
You may have seen some photos/videos of a spot light following a wedding couple around the dance floor on their first dances. What isn't so obvious is that spot lights don't work well unless you have a very high ceiling or a 2nd floor balcony for your followspot operator! You need a good size dance floor to pull this off as well. We frequently use followspots on concerts and special events but the venues where they are effective for weddings are quite limited.
Lay people often use the term "Spotlight" when they really mean "Followspot". We consider a spotlight stationary. Spotlight def: a lamp projecting a narrow, intense beam of light directly onto a place or person, especially a performer on stage.
Large followspot with Op(erator) at stadium
Medium Followspot with Op
Spotlight on stage. Note the hard focused edge and the atmosperic haze. You would not see the beam on the air without haze -- only the light hitting the stage floor.