5. Assuming a High SPF Allows You to Stay Longer In the Sun
People think that coating themselves in layers of SPF 80 means they can safely stay outdoors. Experts believe that products with higher SPF create a false sense of security, and you may harm yourself because of it as you are misled into believing that you are fully protected from sun damage.
What is worth noting is that SPF 30 blocks 97% of UVB rays while SPF 50 blocks 98%of UVB rays (1% difference), hence SPF 30 is sufficient for protection. However, you need to ensure you apply after every two hours of being out in the sun. One application of a high SPF product does not mean you spend hours in the sun because that will increase skin damage and sunburn risk.
If you need to stay outdoors for long periods, you must carry your sunscreen and remember to reapply every two hours. You should also consider wearing protective clothing, hats and carrying an umbrella, and try to plan your outdoor activities for when it is not so hot.