driving north on i5, had just passed cook rd exit, observed huge light hovering aboveat rock quarry off kelleher rd. It was a very bright white light like l.e.d. huge, big as a full moon appears when its fulll at like 10-15 degrees above horizon. biggest and brightest thing ive ever seen in sky, have had 4 other sightings 2 with witnesses but this was much bigger. as i looked at it i tried to rationalize what i was seeing, Maybe a helicopter with a new super bright searchlight of some kind? but no movement or flashing lights.. only saw it for about 30-45 sec.b4 i was going up bowhill and the object was out of sight. turned off at the next exit (bow hill) and drove south down hwy 99 till i got back to the flats so i could get another look at it. as i drove past where kelleher and 99 meet i noticed 2 parked police suvs door to door with no lights on and no one around outside of them . drove south on 99 bout another half mile to a bridge over the rail road tracks turned around and didnt see the object or anything in the area anymore, when i passed by kelleher rd again 2 police suv's were still there and with my headlights shinning on them this time i could see no one was in the vehicles. thought that was strange considering what i had seen and the proximity of the vehicles to the sighting location.