hi,
i have used both of these types before....
okay, the dark style prints on a white background that shows up on the shirt unless you cut it off. becareful when you print it on your printer, the one i used you did NOT have to print the design backwards.
the light style basically prints backwards onto a clear sheet that you iron on,,,you can kinda see the clear background if you dont cut it off and becareful, if any fuzz or hair gets underneath it, you can see it through the decal!!!
wendy