Originally Posted by kickstart

The EU laws don't restrict maximum output, just output above of a specific focal plain. The new B&M IQ-X dyno light is about the equivalent of better 500 lumen battery lights, and matches the usable light of my 1200 lumen battery light at 150' and beyond.
Now that the new EU standards allow battery lights, I suspect we will see significantly brighter battery lights that function like true headlights.

I too desire bicycle lights that can stand with other vehicle lights on the road, I'm just not willing to do that at the expense of others ability to see the road. Fortunately with a combined output equivalent of 1700 lumen between the IQ-X, and Specialized flux expert I have all the light I could possibly need for any condition, and do it responsibly.

Originally Posted by vol

Can it be used for the Chinese light that runs on 4x18650? If so, brighter or lasts longer or both?

Originally Posted by vol

Can it be used for the Chinese light that runs on 4x18650? If so, brighter or lasts longer or both?

Originally Posted by vol

I used to have the light that dim posted in #53 for quite a while. One day it suddenly shut off during the ride. It didn't break, just the charge was running out. After recharging, it's on again, but I didn't want to risk it shutting off without warning. It didn't go dimmer and dimmer first, just went from normal bright to completely off. The light itself was great, and very lightweight. Now I just use super bright flashlight that runs on 18650s, so that I can replace the batteries easily. By the way, wonder if anyone want to try this for 88 bucks: (let us know how bright it is if you do )

Originally Posted by noglider

Goodness, that looks downright menacing.

Originally Posted by kickstart

I rode with someone who had lights like that on their motorcycle, they were no better than the fog lights on my motorcycle. All show no go, super bright up close, but no throw at all, only good for slow speed technical riding.

Originally Posted by vol

Thanks for the answers about the 6 cell pack used for the Chinese 4x18650 lights.

Perhaps a related question: all things being equal (number of LEDs and batteries), are those super long flashlights on 3x or 4x 18650's likely more powerful (brighter) than the stubby flashlights running on the same number of 18650's? (I have a stubby one which is very bright, but never tried the long type). Example:

Originally Posted by noglider

I don't see how length would affect anything unless it influenced the design of the reflector.

Originally Posted by FBinNY

while overall length mostly reflects the orientation of internal batteries, the length may also affect the light. A longer design might allow more room for a deeper parabolic reflector, thereby making for a more concentrated beam, also with the emitter deeper, a bit less light escaped unfocused out the sides.