Thanks for reply.
I have used tips and find that don't get many weeks of wear out of them i.e. after infilling every 2/3 weeks the length of the tip shortens which this particular client does not like. This is where you need to rebalance the nails by doing what some call a backfill, this involves replacing the smile line back up the nail bad so no shadows from her natural nail are showing. To do this you would need to use white L&P. She has really long nail beds anway, can you suggest an alternative. I agree that the white should be further up as I think it looks more natural if your client was mine and had long nail beds to begin with i would either sculpt or use a natural tip and then use white powder to make a smile and natural looking length in white. Maybe use a coverage pink to give her even longer looking beds.
Try practicing using some white L&P on a tip and see if you can master doing smiles as i think this would benefit your client if she has long nail beds. Seems a shame to use white tips and lose some of it.