ΔE 16.2, loose: different enough that you should pick on purpose. Moon Yellow is noticeably darker, warmer than C.P. Cadmium Yellow Light.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 16). Moon Yellow is noticeably darker, warmer than C.P. Cadmium Yellow Light.
The same difference applies the other way round: C.P. Cadmium Yellow Light is noticeably lighter, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See C.P. Cadmium Yellow Light on the colour wheel See Moon Yellow on the colour wheel
All matches: C.P. Cadmium Yellow Light equivalents · Moon Yellow equivalents