What characterizes skin type 4 according to the Smart Tan system?

Skin type 4 in the Smart Tan system is characterized by light brown skin with dark eyes. Individuals with this skin type typically have a medium pigmentation level that allows them to tan more easily compared to lighter skin types, but they still have the potential for a sunburn if exposed to UV radiation for prolonged periods without protection. This classification reflects a common understanding of how different skin types react to sun exposure and how they achieve tanning.

The emphasis on having light brown skin indicates a baseline level of melanin that provides some natural protection against ultraviolet harmful effects, which is significant for the tanning process. The reference to dark eyes also aligns with this classification, as individuals with such features usually have a higher concentration of melanin overall, which can affect how their skin responds to UV exposure.

In contrast, the other options describe characteristics that do not align with the Smart Tan system’s definition of skin type 4. Black skin typically represents higher melanin concentrations and falls into a different skin type category, while fair skin with the capacity to tan easily is more representative of skin type 3. Thus, light brown skin with dark eyes is the defining characteristic of skin type 4 within the Smart Tan framework.