Question on BL and Dodge

[Colonel__Klink]

Hey folks! Just a quick question looking at the character sheets. Suppose a character has a standard basic lift of 20.

I'm looking at a chart that shows "none" as 20 lbs and "light" as 40lbs, light giving a -1 to dodge.

So what's confusing me is this. Is a light load anything between 20 and 40lbs? Or is a light load anything OVER 40lbs but less than the next tier of 60lbs?

I'm asking because this is very important to balance benefits of armor in my campaign! Thanks in advance for helping me with this folks!