Most milk marketed here as "Light" or "Lite" is between 1.3 & 1.5% fat. My sister was querying the logic of "light" Jersey milk as that's generally the creamiest of the lot.
I bought some today, Jersey milk is significantly higher in protein compared to other milk. The Jersey milk I get in light form has 2% fat vs 4.2% for the full-cream variety. Both are 3.9% protein, most other milk being around 3.2%. So light Jersey milk has midlevel fat & very high protein.