ΔE 15.3, loose: different enough that you should pick on purpose. IDF/IAF Green is a little darker, much more muted, warmer than Mecha Light Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). IDF/IAF Green is a little darker, much more muted, warmer than Mecha Light Green.
The same difference applies the other way round: Mecha Light Green is a little lighter, much 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 Mecha Light Green on the colour wheel See IDF/IAF Green on the colour wheel
All matches: Mecha Light Green equivalents · IDF/IAF Green equivalents