How long do you cook a store bought pie crust before making a pie? (lemon meringue)?

i have looked at several recipes for lemon meringue pies that use store bought pie crusts. they all say to bake them until slightly brown before putting in the filling. but i dont want to forget and have it burn. so it would really help if you could tell me around how much time i should bake the crust before putting the filling in. that way i can set a timer and wont forget.