my friend and Isaw saucer craft -silent -eight glowing orbs underneath-with colors-traveled overhead

traveling east to west, maybe 800 to 2000 feet, about 30 mph , a few miles away, from my apartment,i noticed , near the los angeles airport, one of the airliners on there landing approch looked odd, its lights intensified then went out.it was about the same size as the other planes.  Soon i realized as it traveled towards my location it was very different.I called my friend over to see this craft, saucer shaped with eight hemispherical lobes on the undercarrige,  that looked like light bulbs with swirling rainbow colors, then intensifing very bright and shuting off. The craft repeted this sequence across the sky sevaral times  silently. it flew directly over our apartment with a perfect view , i had no camera