The findings highlight the importance of using sunscreen to protect against harmful UV rays, even if some products fall short of their advertised SPF levels. UVB rays can lead to sunburn and increase the risk of skin cancer, while UVA rays contribute to skin aging and cancer. Consumer Reports advises using broad-spectrum sunscreens with at least SPF 30 for effective protection. Sprays, while convenient, may pose risks such as inhalation or uneven application, especially in windy conditions.