Those living in tropical or subtropical climates should be encouraged to use only broad spectrum SPF 30+ sunscreens to achieve adequate protection from the sun.
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Here are a few tips to ensure you get a good tan without the pain. It is recommended to use sunscreen with a high SPF of 30 or more and one that protects from UVA and UVB radiation. Even if the sunscreen says it's waterproof, it is advisable to re-apply every couple of hours, especially after swimming.
SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks about 98% of UVB rays. This means that SPF 50 provides slightly higher protection against UVB radiation compared to SPF 30. However, it's important to note that the difference in protection between SPF 30 and SPF 50 is minimal.
With SPF 50, 2% of UV rays are able to penetrate the skin. That's how you're still able to get a tan even with a high SPF. So in order to prevent yourself from sun damage, you need to reapply at least every two hours.