Instead of it being something you should worry about, you could consider it a blessing. I often see a bright light when I'm in distress or worried about something. I love it when this happens because it reminds me that I am not alone. I tend to see them also when I am very happy about something, which is also nice because it feels like I'm not the only one enjoying my happiness/success. Either that or I have some sort of vision problem haha
I don't think so though..it gives me a warm feeling.