Whether it's a bright light or a fault, glaring things are obvious. You just can't miss them.
Something glaring is obvious to everyone. Sometimes, there's a glaring light that's in your eyes, such as the glaring beams of the sun. Other times, it could be a glaring fault. For example, if you're a very short basketball player, your height is something everyone knows you have to overcome: it's a glaring problem for that sport. Things that are glaring in this way are almost always bad: there aren't any glaring ice cream cones or puppies. You can't avoid looking at things that are glaring, but you wish you could.