I think alot of folk get caught out this time of year - lights have fallen off/broken/batteries gone flat - stay out longer than expected, don't realise its started oing dark a bit earlier.
I see that a lot with cars, headlights not working ect.. but its no excuse really, at the end of the day its their safety and that of others, I have seen some on the road (all different types of riders) and they can be doing a fair lick, no lights dark clothes and bike doing 20mph if a car comes out on them from a junction not having seen them which is possible, who gets the blame in the paper, odds on it will be the driver. I am not great on a bike, but I have ridden and driven anything from bikes to trucks so I have a lot of road experience, and for the most part I know what others are going to do, so that helps me stay out of trouble (most of the time), I have had cars pull out on me even when in my white shirt and bright day light, I suppose I could have avoid the same situation at night no lights and a dark shirt ( if I had been in such a situation) chances are though he would not have seen me at all, and pulled out even further into the road forcing me into on coming traffic. Not his fault but mine, there is no excuse where your safety and that of others is concerned, your own safety in other situations i.e. competitive racing or any other form is you own concern.