High Quality Content by WIKIPEDIA articles! Sunblock (also commonly known as sun screen, sun tan lotion, sun cream or block out) is a lotion, spray, gel or other topical product that absorbs or reflects some of the sun`s ultraviolet (UV) radiation on the skin exposed to sunlight and thus helps protect against sunburn. Skin lightening products have sunscreen to protect lightened skin because light skin is more susceptible to sun damage than darker skin, a number of sunscreens have tanning power to help the skin to darken or tan.