We have chosen polished chrome electrical switches and sockets as our standard fittings to match the excellent low energy wall lights (how much will this save you?).
Our rooms are also fitted with external wall lights plus an RCD protected consumer unit.  The number of lights included depends on the size of building you order.  Although the style may vary depending upon availability, we always choose with care to match the high quality and style of our models.
If you would prefer to choose your fittings to match something specific, like the ones in your home, you can do that too.  Marine fittings for coastal garden rooms differ, due to the corrosion of regular finishes.