Open the small covers in the trunk behind the tail lights. (hatch)
Inside there are 2 Grey plastic wingnuts.
You have to look carefully with a torch to find them.
Get someone to hold the tail light so it cannot fall on the floor.
Remove the wingnuts.
Warning (Installing higher wattage globes may melt your plasting housing)
2012 Focus 2.0 GDI Trend (RHD Euro Focus with US Engine)