My son and i were heading east on rt 460 headed to north carolina in a heavy rain storm. we were nearing the end of appomattox county and entering prince edward county when we noticed a bright white pulsating light above the trees on our left. it was a as if there was a lighthouse in the woods. the rain was so heavy we could hardly see the lines on the road. this was not lighting because it had a consistent pattern to the pulsating. we also witness no lighting from the storm at all. i also thought maybe a transformer blew up but again the pattern of the flashes were perfectly in tune with each other. it lasted about 1 to 2 minutes than just stopped. we looked on our gps zoomed in and out on our nav unit on our bmw to see if there were any airports near by but there was nothing barley any roads in that area. im not sure what was it was but i have never seen anything like this before. the lights were britghter than any light i have ever seen. im not saying there was a alien craft, just saying im not sure what it was. there were a couple other cars driving around us at the same time so im hoping someone else may have got a better look of what this was.