Logan asked: I currently have a small Walmart headlight and am planning on upgrading soon. I keep seeing these huge bike lights on Ebay that are advertised at various sizes from 800 to 4000 lumens. These are just a little bit more expensive than bike headlights you can buy at a bike shop.
For example, here is an 1800 lumen CREE: http://www.ebay.com/itm/NW-CREE-LED-XM-L-T6-LED-1800Lum-Bicycle-Bike-Lamp-HeadLight-headLamp-US-shipping-/330956637818?pt=LH_DefaultDomain_0&hash=item4d0e8d867a
And here is a 4000 lumen CREE:
What are the laws related to bike lights? Is there a limit to the lumens of a bicycle headlight? What about taillights? Do you have practical advice for these?
We wondered the same thing a while back and asked the Florida Highway Patrol. See this post for their answer: