She has a heavy makeup.
She has a light makeup.
What is the antonym for heavy makeup?
Exactly. I think 'light makeup' is okay there.
That's because when it comes to shading or contrast, we use 'light' to mean 'less' in terms of contrast or layers.
I know this because in some schools here, they define 'girls with light makeup' is allowed.
A suggestion: Generally, we use 'wear/put on/apply' with makeup. And, it is 'uncountable'. So, *"She wears/puts on heavy/light makeup.