Grenadiers on the right, Lights on the left.
My naps are based for the Shako ruleset but also used for Black Powder so I have 18 figure Battalions on three bases with 2 Grenadiers and 2 Lights per battalion. Each battalion also has a skirmisher stand, mine have 4 Light figures, which is used to represent the Light company when deployed forward of the battaion as a skirmisher screen.