Many years ago I was sat playing cards with friends when I saw this strange light outside hovering just above a door handle so I went to have a look. It was about the size of a golf ball and had some resemblance to a flame but with very different properties. It was silent. It was in constant motion, it fluttered in all directions. It was soft white colour and it didn't illuminate its surroundings. Small flares would burst from it just like a flame but instead of always pointing upwards these flares took place in all directions without being drawn upwards due to heat rising. There were no visible fumes or smoke coming from it. It just rose upwards ever so gently , after around 15 minutes it was still easily visible at something like 50 - 60 feet in the air. It might have lasted a lot longer but I was being nagged to go back inside and play cards. It looked so fragile I was expecting it to vanish the moment I saw it but it showed no signs of diminishing in size over time. Any idea what it was?