Is this normal for the camera?

I've just noticed that when I bring a flashlight close to my cell phone such a line emerges

Is that normal?

Close

Further away

Have a Huawei P20 Lite

I do not know, but as long as the flashlight works, it's great.

What is that answer?

This happens because the lighting frequency of the camera does not match that of the smartphone. Accordingly, this is normal, depending on the setting and light source.

The lamp does not light up constantly, but regulates the brightness by switching the LEDs on and off quickly, it works very fast, so you can't see it with your naked eye.

The camera of your mobile phone takes when filming (if you want to take a picture shows you the phone so synonymous only a "live video" of what you see) with a beistimten fps number on. Under certain circumstances, this can lead to intereference, you can see that.

But the worse the flashlight, the sooner you can see it with the camera.

With better flashlights, the pulse times are usually so short that you can barely see it with the camera.

Why do you bother streaking on your flashlight, which you only see at high magnification.

Yes, that's true, although it depends on whether the lamp is dimmed. I also have a quality that is very high quality, which produces a flicker at the lowest light level, which is visible only on moving objects, but still visible.

Yes, in part already. But my better lamps can be dimmed to the minimum and you can hardly see it, and thus much less than the cheap lamp at 100%.

Yeah well, cheap controllers make in the end half a half at the pulse times and finished