1. i was on holiday on the thai island of koh samui and was returning back to our our accommodation for the evening. 2. we observed the lights whilst looking outside of our open sided taxi vehicle. 3. we did not know what the lights were but discounted fireworks, candles, lanterns and any type of aircraft. 4. these were brights yellow orbs of lights that moved in formation across the night sky soundlessly then joined by two more. they moved across the bay then up away and out of sight. at this point a total power cut was observed in the town of chaweng where the lights had just passed over. 5. myself and my small group of friends were left in total bewilderment, trying to rationalise what we had seen. we concluded that we had just seen a series of ufo's. 6. we lost sight when the lights moved up and away into the night sky.