Hello, I have vitiligo last 8 years, I have used so many medicine not a single medicine worked ,time passed, last two month I am taking ayurvedic medicine it's working fine last 2 month no new white patches started, and doctor provide me one oil and asked me to take uvb sunlight he said as much as sunlight you take in your white patches the chances of recovery will very fast but it's not possible for me to take sunlight of my back under arms thighs elbow neck means inner side. So I purchased a uvb home light therapy under doctor observation he told me to take light 1 minute everyday and every 10 days gradually increases the dosage. Dear sir/mam my question is that how many days will take to get rid of this white patches and having health skin please tell me any further process what should I do as n extra or etc. Thanks.