Thunder Strom @ Friendship Park

Just when I finish my jogging around 7pm, I saw on north site of my house the clouds gather and became a group of dark clouds. And I can also saw some thunder in the clouds.




Some slow shutter speed photos, the IDS is keep to 200






The lightning are not strong enough, not very satisfy with the outcome. And also I dont understand on why are there additional light displaying on the photos? I didn't adjust any other setting besides the aperture and shutter speed.
Or is it because of the camera lens?
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Some historical Related Post on Thunder

The Art of Nature

The right time again

Before and After

Friendship Park @ Night Time