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Well, what does one expect living in Waikato? Four days of gorgeous spring weather in a row is a bit much to ask for.

So the fog was back this morning, and with it the idiot car drivers who don’t put their lights on. Why? Do they want to die? A white car with no lights in fog is really hard to see. White is the worst colour of all; the water droplets in the air scatter the sunlight so much that the environment appears uniformly lit from all directions, and a white surface just reflects that illumination, meaning it appears at exactly the same luminance (brightness) as its environment. Grey viewed against the same tone of grey. Not easy to spot without lights. Dark cars are a little better; they appear darker than the grey environment and are so a bit easier to see.  But lights help so much. Switch them on.