What would cause a light bulb to glow despite it being off?

Okay I was going to sleep, and in my room there is an old neon light bulb that just keeps blinking when turned on, so I never use it. Last night, however, the strangest thing happened. Even though the switch was off, the bulb was lit. It was producing a very dim glow, and you could easily see the light. And not... show more Okay I was going to sleep, and in my room there is an old neon light bulb that just keeps blinking when turned on, so I never use it. Last night, however, the strangest thing happened. Even though the switch was off, the bulb was lit. It was producing a very dim glow, and you could easily see the light. And not only that, but if I touched the light bulb, it would glow a little brighter around my finger( 7 cm wide halo ). I want to understand how and why this occurs.


Including sources is encouraged
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