If you're following Atkins' program, the recommendation is to choose salad dressings with no more than one or two grams carb per serving. So if you prefer the taste of the "light", and it's within that carb limit, then you should be ok as long as you keep an eye on the serving size. What many folks do is stretch it out by mixing 1 Tbsp bottled dressing with 1 Tbsp olive or other oil for their salad. The oil adds zero carbs, and provides good fat. I wouldn't be concerned about the calories, except to make sure that you're getting enough. Low-carb is not low-calorie.

hth,

Doreen