Did anyone see the bright balls of orange light over Bearsden, Glasgow tonight Friday 13th August 2010?

I saw two of them Northeast of me hovering and then moving slowly. I thought at first there had been an explosion but there was no noise and neither lost any altitude. One of them grew in intensity, it looked like a teardrop shaped ball of fire. It's light became less intense and shrank back to the size of the other orange ball of light. Both then moved off, I think to the north, but my sense of direction isn't too sharp. I know that there have been other reports of this phenomenon but until I saw for myself I had chalked them up to overactive imaginations. Does anyone have info on them? I live under Glasgow airport flightpath and can say with certainty that this was no conventional aircraft, if it was an aircraft. Like to hear from anyone who saw same please