p21 [para] 46. A light fitting may contain one or more lamps.
Johnny Two-Jags' contribution?
Who will want fluorescent tubes in their lounge if that's the new extension?
Builders only need to not fit the external lights, just leave a box ready and they're home and dry. The homeowner can call an electrician once the installation is signed off and fit several WWII searchlights if so desired. It's all tosh!