I am light so I started with 30 seconds on the softer areas and increased by 10 secs the next two days if not pink. Bony areas like my knees and hands i started at 50secs.
Just be careful and be consistent. I do the treatment every three days and have been noticing many areas of freckling after about 20 treatments.
Be patient, it takes time

Hi
I use the narrow band 311 usb lamp at home and have been getting freckled areas. The key to this treatment is consistency.

It will be ok! Just start with a few seconds at a time to test how your skin reacts. There should be slight pink but not burning. Always start slowly, you can add more time but you cannot subtract burns to your skin!😊

i use kernel uvb at home.
anyone wanting to see before and after can message me (Phone number can only be seen by the question and answer creators)
i will be happy to help