Are there times when you need to apply sunscreen even at night?

Is this going to be considered an obsession? My skin has become so sensitive and my freckles seem to be getting darker, so I’ve become incredibly fixated on sun protection. However, I’m suddenly confused and worried about whether there are times when I should apply sunscreen at night as well. I always thought it was common sense to apply sunscreen only during the day when the sun is out, but lately, while browsing the internet and YouTube, I’ve noticed quite a few people saying that you should apply it at night too, which is really bothering me.

I’ve heard that even the fluorescent lights we leave on every day at home emit minute UV rays that accelerate skin aging, and above all, I’m scared to hear that the blue light from the smartphones and monitors we hold all day penetrates deep into the skin and causes blemishes...