I have a commercial space with recessed ceiling lighting. There's 3 lights in the front, 4 down the hall, and one in the bathroom (all on one breaker). Randomly throughout the day, they'll dim/flicker and sometimes even turn off for hours at a time. We've had 2 electricians look at it with no success.
The first electrician said he tightened wires in a few of the fixtures in the front, which helped for a while, but ultimately the problem came back the next day.
The second electrician checked our panel and ended up following it to the bathroom fixture, where he said the wires were loose in a junction box. He tightened those up and the problem was fixed for a bit, but the issue soon returned.
I'm reluctant to keep paying them to come back and keep looking (for what could be for hours) and still not fixing it again. Is there a chance that this problem is caused by loose wires in every fixture? Or is there something weird going on here?