Large White Aircraft Seeing Over Burbank

At approximately 4:30 in the morning on July 4 and I walked out onto my second-story balcony that faces east to smoke a cigarette. I heard a humming noise coming from above so I looked up into the sky and saw an extremely large white craft flying west directly over my building. It had a flat bottom, slightly rounded sides, and white/blue/red lights on the craft. I immediately thought UFO mothership.  I’ve never seen anything this large flying this low, and ran back inside to grab my phone. I was able to snap two photos and wanted to grab a video, but the craft flew over my building and out of sight before obtaining. It has bothered me ever since, not knowing whether there was some type of blimp (closest object I can relate the craft to) or truly some type of unknown aircraft flying over the city during those hours. I just can’t shake the image of this craft out of my mind since July 4. Even though it has been some time since my sighting I felt it was applica! ble to report.