@miriam98 - It appears that LED light therapy for skin is effective and medically approved for a wide variety of ailments. However, I think you should be careful before trying out this treatment if you have certain preexisting medical conditions.
For example, if you have epilepsy, I wouldn’t recommend that you go for this treatment. The reason is that certain wavelengths of light might trigger a seizure, as has been shown to be true with cases of people getting seizures from video games and things like that.
This is not a medical opinion, it’s just something I think you should be aware of. At the very least, consult your doctor before going in for the treatment.