One look at the Boticelli Softlight (
http://www.bhphotovideo.com/c/search?Ntt=Botticelli+2K+Softlight&N=0&Initia...) for which those grids are intended should tell you why you would not want or be able to use these grids directly on your Blondes. Snoots, including your own black-wrap versions, would be much more effective and workable.
The description of the grids is a bit misleading: "Eggcrates act in much the same way as snoots do". Snoots help you to create a narrow cone of light. Grids help make soft lights more directional, reducing spill on all sides. They are often added to the fronts of chimeras and the like for that reason. They also chew up a significant amount of light. Cones do not.
Rick Wise
Cinematographer
San Francisco Bay Area
http://www.RickWiseDP.com
