Anyway - I thought that in conditions of low light/bad visibility it was illegal not to have lights illuminated, car or bike? Personally I will also switch on a bright flashing rear light in shady conditions on a sunny day, or when riding into the sun, especially on an A road. I know from experience as a driver that cyclists are more noticeable if they do this, often you can be aware of a rider using a rear light way ahead of you, well before they would be visible otherwise. I would rather be seen than not, and do not regard it as an infringement of my human rights to use lights, or wear light coloured clothing - just common sense. Oh ... and motorists that don't use their lights in bad conditions are equally stupid