Originally Posted by
acidfast7
Do yourself a favour and a hub powered dynamo wheel for around $120 and a nice front light for $60 and be done with it
Sounds like a plan for a back-up but what powers the light when you stop? Last bike I had (rim-mounted) dynamo lights on you had to get about 20km/hr to see anything with them and lacked any sort of battery to keep them lit when you stopped.