The lights in the barn, although lovely, sometimes need to be turned off. This can be due to any number of reasons. For example, an artist has asked for the lights to be turned off because it doesn't give the desired look.
To turn the lights off, you will need to grab a large ladder capable of reaching the beams. Use the ladder to climb up to the beam just behind the projector/beamer and you will find an extension outlet. Unplug whichever plug correlates to the pink lights.