Originally Posted by
noglider
Anyway, as I add dynamos to most or all of my bikes, it will soon be a no-brainer. There will be no reason for me to be light-less on the road.
Battery or dynamo, bulb or LED, stuff happens. I don't back up my headlight. But on the rear is use a bright blue (police) strobe which is very attention getting (and illegal). But I also carry a red Planet Bike super flash in my pocket as a backup.