I found a recipe for brownies I want to try. It calls for
1 1/2 cups packed light brown sugar
How can I recognize if they mean hard or soft brown sugar? And how much of a difference does it make for the completed brownies if I use the wrong type? Should I just adjust the amount of sugar or other ingredients (and if yes, by how much)? Or do I have to try to make a substitution? I found a question which explains how to make soft sugar, but it requires a food processor, and I don't have one.
Edit Here is a picture of sugars, as Jay suggested per comment:
In Germany, the only type found under the name "brown sugar" (brauner Zucker) is the one in the upper right corner. But I have heard that American recipes might need the kind in the lower right corner, which is not normally available here.