yes, jmoore, that tip is confusing there - he's talking about trucks originally with single element sockets - the front [park] lights will be 4cp, same as the tail element of the rear lights with dual filiment sockets, and the brake lights [which also are the rear turn lights], will be 6cp .... I should have linked further to the
item of interest, and it seems to me that confusion was the reason I originally requested that picture be added

Bill