What happens if you use john frieda lightening spray on brown hair?

my sister uses this spray and her hair is blond i decided to try some and after 3 times of using my hair is naturally very dark brown it went lighter brown but started to turn ginger, if you want blond/lighter hair just dye it, its not worth the risk. If you didnt want ginger hair then dont use this spray, if you use it for a bit then it will just go lighter brown.