light or reduced-fat butter =

fat - gordura

butter - manteiga

light - leve

reduced - reduzido or rebaixado.

so it´s more or less "manteiga leve ou com baixo nível/índice de gordura"

I am giving a free translation, because everyone knows that light is food that gives

low cholesterol (but isn´t cholesterol free), and reduced is some food that have fairly

more fat (gordura, portanto colesterol) than a light food.

So, if you or the current reader is on diet, keep from these kind of diet or see your dietetician to further details.

Any comments from doctors/dieteticians either in English or Portuguese is welcome.

Ah, and coming from you dietitian  too.

See ya.