Need a lighter skin tone. Skin tone!

I am a 26 year old male staying in Mumbai. I was born fair but over the past two decades of sun exposure and not taking proper care of skin, i have gone visible dark on face, hands and neck. If i stay indoors for a few days, i turn a couple of shades lighter but being a working professional that is not possible. My body is quite fair and I wish to get back the same complexion on the face and hands and neck as I have my marriage approaching. Can you suggest everyday home remedies or pills like glutathione that can make me regain my lost complexion of yesteryears in a month or two. How safe is glutathione. What are its harmful affects and their probabilities of them occurring. also, is the change due to glutathione relatively long lasting or we have to keep taking pills to maintain skin tone