Two extreemly strong flashing lightsTwo very bright white flashing lights (appr. 1-2 sec. interval) The strange thing is that the movement was very fast and the rear and the front light where on the same axis. That is the lights where not moving side by side as you would see on an aeroplane. No other lights flashed during the whole time. I saw these lights mabee close to 50°-60° up from where I was standing no noise was heard but the flashes where so strong that I had to blink my eyes every time they flashed.