Quoted from Langless28:
Do you only stock your wire collection in 18awg? So you don't mind replacing a smaller wire with 18awg as long as they are color correct?
Depends on the application.
Some are exclusively stocked in 18 others exclusively stocked in 22 and there are some color combinations that are stocked in both.
Switches and feature lamps are 22
Coils main runs of GI are generally 18 but sometimes chained with 22.
Grounding sides of coils can sometimes be 22 if not and if color coordination is a concern but I really need a 18 in those cases I will use two 22s that are color correct.