The gadgets which log your driving, for insurance purposes, to decide how good/bad a driver you are - apparently they mark you down if you do much night time driving, because there is an increased risk of accidents at night. That is very much at odds with my own experience...
I've always found night driving, to be a much more relaxed experience than during the day - much less traffic on the road, almost no delays, and what there is, is much less frantic generally. If I have any long distance drives to do, I have always try to do them during the night hours.
No I don't have such a gadget - having one fitted would make no difference at all to the cost of my insurance, because my driving record is impeccable.