The following is the translation of the given 'Bahasa' text to 'English' while preserving any html tags: "Sunlight can provide benefits to health, such as helping the body produce vitamin D. However, excessive exposure to UV rays can damage the skin and increase the risk of skin cancer and premature aging. Therefore, it is important to use the appropriate sunblock to protect the skin from the negative effects of sunlight. With various brands and formulas available, choosing the right sunblock for your skin type and needs can confuse many people. To learn more, follow the steps below to choose sunblock."

The information commonly listed on sunscreen packaging is about SPF or Sun Protection Factor. SPF is a measure of the protection provided by sunscreen against UVB rays, which are the type of sunlight that can cause sunburn. The SPF number indicates how much protection the sunscreen provides to the skin. It is recommended to choose a sunscreen with SPF 30 or higher because sunscreens with SPF below 30 are less effective in protecting the skin from UVB exposure.

"Sunblock plays an important role in protecting the skin from UVB rays and preventing damage from exposure to UVA rays. The protection level of sunblock against UVA rays is assessed using a scale system called Protection Grade of UVA (PA). This protection level is indicated by the additional symbol '+'. The more '+' symbols, the higher the level of sunblock protection against UVA rays. Therefore, it is recommended to choose sunblock with PA++ to PA+++ when in places with more intense sunlight exposure."

Besides sunlight radiation, exposure to blue light is also something that should not be ignored. Blue light is often referred to as high energy visible light (HEV). Blue light is naturally emitted by the sun, however, screens from electronic devices also produce blue light. Prolonged exposure to blue light can cause premature aging due to damage to the skin's DNA. Therefore, it is very important to choose sunscreen that has anti-blue light protection to protect the skin from the effects of this radiation.

Athletes who train outdoors need to wear special sunblock designed for outdoor activities. Generally, waterproof sunblock tends to be stickier when applied to the skin. However, this provides extra protection when engaging in outdoor activities. Although waterproof sunblock is effective, it is important to reapply every 2 hours as its protective ability may decrease over time.