Think about cost-benefit: in-office treatments are much faster however more expensive; take-home trays are cost-effective with steady

https://zanderckjg432.timeforchangecounselling.com/the-function-of-led-lights-in-specialist-teeth-whitening

Consider cost-benefit: in-office treatments are quicker however more expensive; take-home trays are cost-effective with progressive results-- choose based upon timeline and budget.