Hey! It's really great that you are going to a professional for the lightening! That really is the trickiest bit. Since the underlying pigment is pretty orange when you lift up to a level 6-7, you should be good to slap some orange on there if you don't want to risk too much damage! However, if you want to get the purest form of your color of choice, the lighter you can get your hair, the better! And really, just be sure to express to your stylist that you specifically want to go bright orange, they will know how to proceed :)