The sub assemblies and components that make up this Headlight(s) include this Lens-comp,head Lamp, the most expensive part.
Some items from this specific schematic: Collar,l=6.6, Bolt-flanged,6x12,bla, Bulb,12v 10w, Bulb,12v 32/32w.
In this schematic the "Bulb,12v 10w" is used most often.