: Why do lights flicker initially when they are switched on?

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Like why does it happen? And sometimes it does, sometimes it doesn’t.

In: Engineering

Contact problems, faulty wiring connections, worn-out receptacles, or a bad filament can all cause flickering. Often, these problems occur as the light bulb ages. They could also happen as the result of wear-and-tear, improper voltage, or bad wiring inside the fixture.

If you are in India and you are asking about the so-called tubelights, then it is the choke that needs time to kick in. It is also because the starter has not energized properly.