Hot air rising

It would appear there were a number of Oriental lanterns released on new years eve, consisting of a small candle or tea light, suspended under a paper canopy, which makes them float up into the ether with a ghostly orange glow, especially well on a cold night I would surmise... Ok I wish it had been a UFO but I'm not so sure. After all, it was nothing like the real UFO I saw in 1985....