Why do flies fly round lights even if not on?

Question

Why do flies fly round lights even if not on?

Answer 1

Possibly they're attracted to the lingering heat around the light. Even when lights are turned off, they may still retain some heat from the last time they were on.

Answer 2

Heya

They continue to fly around the light bulb because there is heat being emitted from the light bulb, even though it has been turned off. Moths and other flying insects are attracted to both light and heat. Once the heat has dwindled away, the insects will look elsewhere (usually its the nice warm human lying asleep in bed).

Hope i helped

xx