Ask for a booklet guide from your LLC on the Lite program which will have the measurements for all foods in there. Have a look at calorie values per 100g of vegetables and salad items (of the allowed varieties as described in booklet) as well - as you should not really exceed 800 - 850 calories per day (including food packs).
But the foods allowed are basically most types of spices, savoury boullion (like Marigold's) for the 'stock', most kinds of protein in 150g-200g portions (raw), vegetables (broccoli, cauliflower, carrots etc), and salad. No starchy food (so no potatoes, beans, bread or pasta), and no diet coke or anything like that.
I would advise to keep to the 3 foodpacks per day, keep to your daily allowance of milk (for the tea/coffee), and keep to just 1 meal per day.

Enjoy Lite - and most importantly, use it as a learning exercise... I know I definitely used Lite as the cornerstone to KNOWING what a portion size SHOULD be, how much I should have of each food group, and how it all affects me. Abstinence is tough, but Lite is tougher. It is the true test for all the mental bluff you get taught!
Most importantly - experiment with your meals and HAVE FUN!