Do you need to apply sunscreen indoors? Under what circumstances do you need to take sun protection measures indoors?

Summer is the time when girls use sunscreen frequently. Many times, you can always see girls walking on the street and applying sunscreen on their arms and faces. So what if it's indoors? Do I need to wear sunscreen indoors?

Do I need to wear sunscreen indoors?

It depends on the specific situation. Since glass can block UVB, and according to field tests, on the first floor on a sunny day, in a non-direct sunlight area 1.5 meters away from the glass window, the UVA intensity is only about 1.2% of the midday sun, and no special protection is required. However, if you are in a high-rise building and it is a sunny day, using uncoated glass, the indoor UVA intensity will be higher. If you are exposed to direct sunlight, you must pay close attention to sun protection, especially UVA protection. If the window has anti-UV coated glass, you don’t have to worry too much about UV rays even if you are close to the window.

When should you take sun protection measures indoors?

In most cases, no special sun protection measures are required for low-rise interiors, except in the following cases:

1. Sitting in direct sunlight for a long time

2. Within 1.5 meters from the window

3. No curtains, coatings or other shielding facilities

4. In high-rise rooms, there is a lack of trees and buildings to block the sky, and the sky scattering is stronger, so you should be more careful. In any case, you must consider sun protection in places exposed to direct sunlight.

Do I need sun protection under indoor lights?

After testing, it was found that the UVA radiation level of commonly used indoor light sources is only a few microwatts per square centimeter, which is negligible compared to the direct ultraviolet radiation from sunlight. Even strong stage lighting (dozens of high-power spotlights illuminating the center of the light) is only about 50uW/cm2, and does not require special protection. Studies have shown that if there are cracks in the fluorescent coating of energy-saving lamps, ultraviolet rays may leak and damage cells cultured in vitro. The solution is simple - just add a lampshade. This is a much easier and more effective method than applying sunscreen. The good news is that we have entered the era of LED lighting, and the wavelength of light can be controlled more accurately and precisely, so we no longer need to worry about this problem.

Do I need sun protection when I'm using my computer indoors?

After testing, the ultraviolet radiation of LCD computer screens is 0, so no sun protection is required. When facing the computer, the skin easily becomes haggard and dry. The main reasons may be that the thermal radiation causes the skin to lose water faster, and the blood circulation slows down due to sitting for a long time, rather than ultraviolet rays or electronic radiation. There is no need to use sunscreen or isolation products in front of the computer, as we cannot block infrared radiation.