There is a great thread about this posted in Laurie's Lounge and can be found here
UV light is what bothers some of us. Some people have no issue with it but others of us can actually be thrown into a flare by the sun. It isn't just about rashes, it can be about what that time of light does to our over all well being. When we talk about sunlight you should also know that florescent lighting can be just as harmful to some of us. I use a neutragena (sp) 100SPF on my face. I like it because it isn't oily greasy. I keep a 50SPF sunscreen in my purse to use in the car, before a trip to the store, during a trip to the store if I need to re-apply etc.
If I am actually going to be out in the sun then I wear a hat (which I HATE), long sleeves and long pants. There is actual clothing that offers UV protection but I found it to be too think and hot. I prefer to use sunscreen and wear thinner clothes but I live in Texas where it is 100 degrees right now. The one tip I am going to give you is this .. Don't forget about your hands and feet! I wear a lot of flip-flop type things and your feet are easy to forget but they can let the UV rays in and make you feel bad just as much as anywhere else.
Go ahead and click the link above. THere will be TONS of information on this topic