After reading this thread, I opted to buy the
DiNotte 400L. I put in a review, but it hasn't appeared yet, or they are filtering it to only 5-star praises. I gave it 4 stars.
The negatives:
1. Hard to know exactly how much juice is left - the light blinks rapidly 3 times at 20% remaining. It could be missed.
2. Battery run-time is well-below advertised 2.5 hours when it is cold (20-25 degrees) unless you keep the battery in your pocket in which case it lasts as advertised.
3. Switch is tricky to operate with gloves/mittens and requires putting your hand over the light - could be a problem with helmet mounts while riding in winter. Luckily you don't have to access the switch except for on...ride...off, and you could stop, adjust it, continue while hiking.
4. Do not leave the engine connected to the battery when not in use as the soft start / electronic switch draws power all the time waiting for the 'on' sequence.
The positives:
1. It's light - adds 8.3 ounces to my helmet
2. It's small
3. Lots of mounting and adjustment options, includes an extension cord to put the battery in your pocket
4. IT IS BRIGHT... almost like a car headlight bright. It has 3 settings - 100%, 50% and 10%.
5. You get lots of extra lenses. I'm happy riding with the default lenses.
After 5 trips and some learning/experimenting, I'm pretty pleased - it's vastly better than the NiteRider system it replaced (which to be fair was 5+ years old.)
I may order the headband mount and bring it along for night hiking - either as the primary or as a backup. I would want to try it locally with the different lens kits. I don't want to keep swapping lenses between hiking and cycling. 400L would be way too bright, except possibly above treeline while searching for a trail, person or gear. It would definitely annoy companions.
Tim