What does the little light on a GFCI outlet mean?
Many newer GFCIs do have an LED light, but they mean different things on different brands. So I have not tried to memorize the light colors and their meanings. But if a GFCI normally shows no light but does now, or if it normally shows a light and now doesn’t, then this is probably to tell you that the GFCI is tripped. In addition, the presence of a lit light also tells you that the GFCI has power available to it, so that its inability to run things is from being tripped and not from lacking power to its box.