I try to take care of my skin by avoiding excessive sun exposure
That's a smart choice. I don't like spending much time in the sun myself.
It gets dangerous with UV exposure being the primary cause of melanoma
Melanoma is one of the main reasons I don't enjoy prolonged sun exposure and have never used a tanning bed. I'd rather be pale and cancer free. 
I get bad sunburn too from just a little exposure to the sun
I'm not sure if it's my lack of time in the sun or maybe sensitive skin, but I burn easily too. I could probably tan, but never spend enough time outside to find out. I hate the peeling skin after a sunburn too.
Sun tanning
Sun tanning or simply tanning is the process whereby skin color is darkened or tanned. It is most often a result of exposure to ultraviolet (UV) radiation from sunlight or from artificial sources, such as a tanning lamp found in indoor tanning beds. People who deliberately tan their skin by exposure to the sun engage in a passive recreational activity of sun bathing. Some people use chemical products which can produce a tanning effect without exposure to ultraviolet radiation, known as sunless tanning.
Impact on skin health.
often have high rates of cataracts because of the increased levels of UV radiation in the upper atmosphere. It is hypothesized that depletion of the ozone layer and a consequent increase in levels of UV light on the ground may increase future rates of cataracts. Note that the lens filters UV light, so if it is removed via surgery, one may be able to see UV light.
Prolonged exposure to ultraviolet radiation from the sun can lead to melanoma and other skin malignancies. Clear evidence establishes ultraviolet radiation, especially the non-