Those are just advertising terms - they don't mean much of anything! They are meant to make the uneducated buyer "feel" better about their purchase. What you want for flowering is the one that puts out 2,700 K light. Some call it "Soft White", some call it "Warm White", but these terms are misleading too! The only reliable measure of spectrum, for flourescents, is the "K" rating (Kelvin color temperature rating) IMHO!