The shape of the air density will cause a lensing effect. It won't be a perfect sphere because there is a stone monument between the source and the camera that will deform that shape. Even if the cause was lightning, the shockwave will still be present and have an effect that will be visible in other bright areas of the footage though they will be less apparent because they aren't an isolated point source. That lamp may be led and not a hot wire in a vacuum. You need to determine which to support your em induced current hypothesis.
It's a sodium bulb and I'm not suggesting it's lightning.
You are actually the one who needs to determine if nearby candlelight illumination gets brighter in a shockwave before inducing your hypothesis.
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