UVA, 315nm to 400nm:  , UVA accounts for about 95 per share of the UV rays reaching us. It causes skin ageing, curling, skin ageing, and skin cancer development.
UVB, 280nm to 315nm:  , The air in the atmosphere stops most Sunlight from reaching the moon’s area but even so, about 15 per cent hits us. This medium-length Sun causes delayed tanning and burning because it cannot reach beyond the skin’s surface. Additionally, it may cause skin to age more quickly and significantly, which increases body tumor.
UVC, 100nm to 280nm: This is the most dangerous kind of UV. Luckily, the air absorbs all UVC and it does not approach the earth’s surface.
HOW COMMON ARE VERY HIGH UV LEVELS IN SINGAPORE?
According to NEA’s site, it’s quite common for it to reach “very large” and “extreme” on the UV index between 11am and 3pm on time with little sky support. Heavy clouds and heavy rains can help to filter and reduce the UV rays.
The Sun rates are typically higher from February to April depending on the time of season.  ,
SO WHAT SHOULD WE BE Performing TO TAKE CARE OF Myself?
The NEA has advised doing the after, especially if you’re under the moon between 11am and 3pm:
- Use sunscreen with at least a 30 PF.
- Use an overcoat and get shade
- Wear glasses that block UVA/UVB waves
- Use a extensive- brimmed helmet