A single lamp assy each side (EG one on the LH and one on the RH as in a factory GQ Patrol) with a single globe with a low and main beam filament counts as 2 not 4.
A dual lamp (IE one with 2 globes or two seperate assy's side by side with a globe each) where both are illuminated when main beam is selected counts as 4
Anyone who tells you different is talking out there arse.