Illogical train of thought. Whither a bike has a lamp, too dim a lamp or no lamp at all it has nothing to do with "Causing" an accident. It has to do with "Preventing" an accident. As with most preventative measures and/or safety equipment, there are no guarantees that anything you buy or do on a bike to help increase your safety or road presence while riding will make you immune to road side accidents. Most people I think already know this.

When it comes to bike lights I think the main issue is; "How much attention can a bike light garner"? I'm of the opinion that if a bike light ( or lights ) are bright enough and clearly visible ( to anyone not drugged or not looking straight ahead ) there is a much better chance that the person who saw the light(s) will take measures not to hit the person with the light(s). The better your light strategy..ie..brighter lights, multiple lamps for a larger signature, the better your chances of being seen in low light conditions THUS lowering your chances of being hit my a motorist. I don't need a rocket scientist to tell me that my 200 lumen/blinking seat post lamp coupled with my 70 lumen flasher on my helmet is going to get me seen better than the guy riding wearing dark clothing and using only reflectors on the pedals. Now if the guy with no lights makes it home he lives to see another day. Good for him. That said I'll take my chances using my common sense and he can take his chances with his.

I have no documented facts or bogus surveys to support my opinions only my own common sense. As such I have more trust in my own common sense that what I read in an idiotic German survey. I already know that in Germany it is illegal to use a flashing front or rear light. I'm told this is because the powers that be there "Believe" this will confuse motorists...which in my opinion is utter lunacy.