Original sentence: The most effective sunscreens protect against both UVB (ultraviolet radiation with wavelength between 280 and 320 nm), which can cause sunburn, and UVA (between 320 and 400 nm), which penetrates the skin more deeply, with overexposures resulting in more long-term effects, such as premature skin aging
Edited sentence: The most effective sunscreens protect against both UVB (ultraviolet radiation with wavelength between 290 and 320 nanometers), which can cause sunburn, and UVA (between 320 and 400 nanometers), which damages the skin with more long-term effects, such as premature skin aging