Ok...so attempt 12
Twilight Wave 1/2 - dark
Twilight Wave 4 - light
Twilight Rainbow Collection - light
RD Wave 1/2 - light
RD Wave 4 - dark
RD Rainbow Collection - dark
Pinkie Wave 1/2 - light
Pinkie Wave 4 - dark
Pinkie Rainbow Collection - dark
Rarity Wave 1/2 - impossible to tell
Rarity Wave 4 - impossible to tell
Rarity Rainbow Collection - impossible to tell
Fluttershy Wave 1/2 - dark
Fluttershy Wave 4 - light
Fluttershy Rainbow Collection - dark
Applejack Wave 1/2 - dark
Applejack Wave 4 - light
Applejack Rainbow Collection - dark
??? Just as an approx guide
And thats a great clue Bronley that the Target set dont have any markings underhoof