Question

What does the term light mean when used on a food label?

Answer 1

All health claims are regulated by the FDA and USDA. When a food label uses the term "light" or "lite" it indicates that a food has one third fewer calories or 50% less fat, or 50% less sodium than a comparable product

Answer 2

To say that a food is "light" or "lite", it must be at least 30% lower in at least one typical value, such as calories or fat, than standard products.  The label must explain exactly what's been reduced and by how much – for example, "light: 30% less fat".

Hope I helped.