Detailed answer

While it is true that some UVA rays can penetrate windows, the risk of prolonged sun exposure indoors is significantly lower compared to being outdoors. In most cases, the amount of incidental sun exposure you receive while indoors is not substantial enough to warrant the use of sunscreen. However, if you have specific circumstances such as sitting near a window for long periods of time or working in a place with intense artificial lighting, it may be beneficial to consider sunscreen with broad-spectrum protection. Additionally, incorporating other sun protection measures like using curtains, blinds, or window films can help further minimize UV exposure indoors.