Passenger jet almost collided with a strange light in the sky - at the same time there was power failure in the city belowIt was a warm and starry night, and I was sitting outside in my sisters garden with my head back watching stars. The property I was on is situated on a peninsula on the westcoast of Zealand, Denmark.Overhead is an air corridor I think, because you often see passenger-jets crossing west-east og east-west. At almost 2.am I spotted a jet on an eastern course at an altitude of maybe 24.000 feet. I followed it with my eyes having nothing better to do.After a couple of minutes I took my eyes off it and lighted a cigarette. When I looked for it again I saw the following: Maybe 20 km away and above the city of Kalundborg in the eastern sky close to 'my passenger-jet' was a light as bright as Venus, but it was moving and swelling. 'My jet' suddenly switched on its landing light, which couldn't match the light from the other craft at all. The passenger-jet seemed to make a rapid move to the right, whereas the bright light almost danced around it on its left side. And it was still swelling now with a milky halo, which again were surrounded by a white rim. In size it would still be like Venus in all its might, but the halo around would be ten times wider. The passenger-jet just looked like a jet with its light turned on. The strange craft seemed to almost lock on to the passenger-jet...as if the jet couldn't get away from it.I was quite alarmed by this and was thinking: so now it happens. Suddenly the lights of the strange craft went out and nothing was to be seen of it. After five seconds the passenger-jet turned off its landing light.For all I know it could have been an advanced military craft getting too close to a passenger-jet, whose pilot in panic would have turned on his lights to warn the other craft. But two things make me wonder.1. My own immediate reaction. I've seen strange crafts before and have been puzzled. I've even reported my sightings to you twice. But I am still a sceptic and search for at rational explanation. But this time I felt a deep fear.2. There was a blackout at the hospital of Kalundborg that night. It happened at the same time as the strange craft were immediately above the city. My sister works at night on that hospital and has been for 20 years. She told me about the blackout the next day. And said that they had never had a blackout before and for the first time they'd had to power up the generator.I reported this sighting to the danish SUFOI (Scandinavian UFO Information), but they managed to lose my report, which they have apologised for, but I don't really trust them. I wanted the report posted in Denmark in case the pilot on the aircraft were Danish. He might have checked to see, if anybody had observed something from the ground.I still wonder about the incident, so I decided that the right thing would be to mail it to you.