Does anyone happen to know what causes the white light effect at the rears of the cars? They all seem to do it, but it's only apparent at racing speed.

It appears to come from under the rear light area - more of a light or flame in appearance, rather than dust or water vapour. I suppose it's possible that they do this all the time, but it's only visible in the night sessions. IMG_20180407_174447563.jpgIMG_20180407_175714625.jpg

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