In the cres, in the resource, it references a text string. The text string isn't in the package, its in the lighting files. Break that link, and you break the LGHT. You can also edit all the cres to be 0's as well,but that is the long way round (imo). You can see a great example of a broken link to the light file in the two tile open me, or one of the M&G windows, the ones with the bay window.