This may sound strange, but at about 8:30 PM every night, sometimes 820, sometimes 835, but always right around 830, one of the lamps in our family room flickers for about eight to 10 seconds. There are no appliances or anything else in our home that come on at 8:30 PM every night so we have no idea what is causing this. And it is not the street light outside because that comes on earlier. Tonight instead of flickering the lamp actually went dark about three times and then came back on. It is a lamp with a dimmabke LED bulb on a dimmer switch. We are concerned that there is an electrical problem in the home but we see no other signs other than just this single lamp at night . please help !