In Australia .. a pollie made headlights on for motorcycles for all new motorcycles - wired in. After some years of this the results were in .. there was NO change in accident rates between motorcycles with lights on and light off. The law has been changed back. If the visibility is poor I'll turn my lights on. If the visibility is good .. I'll leave them off. If I see some one has not noticed me and I have time I'll use the hi beam flash button to use my headlight in a on/off sequence - to attract attention, cannot do that if it is already on. My choice. Some want the same choice with regards to helmets. Fine, I chose to use a helmet. Some people chose to ride in thongs. It should be noted that some people cannot see... they cannot see big red fire trucks with many flashing lights .. they cannot even hear them! they cannot see trains a mile long .. they simply cannot see .. there head is somewhere else. Motorcycle headlights on make no difference to these blind people. They should be avoided.