What is the difference between professional and at-home light based treatments?
Professional salons in general use light intensities at a much higher energy level, which makes hair removal results last longer. However, removing 100% of hairs permanently with laser or IPL is highly unlikely, even in professional salon treatments. Even there, maintenance treatments are required from time to time. At-home laser or IPL solutions work in a similar manner and quite often use gentler light intensities.
Although this may result in hair removal that doesn’t necessarily last as long as a professional treatment, it is far better and more “permanent” than any other at-home hair removal method such as waxing, epilating, shaving etc. because your skin remains smooth and hair free even in between two treatments.