I found out how to replace some icons in the bought brightbox-theme.
Now, I've found some sites where you can download icon-groups most of the time 'for private and non-commercial use'.
What is meant with non-commercial use?
For pictures it means you can use it on your (business-related) site, but for example you can't print them on a t-shirt to sell.
What is meant here for the icons? Can I download them and use them on my business site or not?
Thanks for your answer already!