Would I be required to install a 15 or 20 ampere 125v. receptacle in a detached building (not a garage) at a residence? Or, could this be an option? All the contractor installed was a luminaire.
The light in a detached utility building is a luxury, not a requirement, nor is a receptacle. As a design issue I can't imagine bringing 120v out to a utility building for a light and not putting in a receptacle but I am not sure how you can require it.