ΔE 21.5, loose: different enough that you should pick on purpose. Lime Green is more muted, warmer than Permanent Green Light.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 22). Lime Green is more muted, warmer than Permanent Green Light.
The same difference applies the other way round: Permanent Green Light is more saturated, 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 Permanent Green Light on the colour wheel See Lime Green on the colour wheel
All matches: Permanent Green Light equivalents · Lime Green equivalents