BRIGHT light panned like a spotlight in both windows in my bedroom - no sound - no cars - no people. 2nd time this has happened

I was the only witness. I did not physically see anything but a BRIGHT light. I was in my bedroom, wide awake & on my phone. I saw a light coming through the window beside me on my right and the window on the other wall to my left. The light panned like someone was shining a flashlight or driving a car. But I did not hear anything or see anything when I looked out my window. This only lasted less than a minute - maybe 15 second, but it was a very steady light. The light was as bright as a photo being taken wirh the flash or the sun's light. When I saw the light, I will admit I got scared and turned my phone on lock mode to hide my light & as soon as I did that the light in the windows vanished. I will say, the light seemed to shine for 15 seconds to a minute, because it was slow and fast at the same time. I'm so puzzled. This is the second time this has happened to me and I was the only witness. Same exact experience. No time was missing, but the complexity of trying to figure out how long the light shined is quite puzzling. It happened quickly and steadily. I saw it happen quickly, but in a different way it lingered for so long in that quick moment.