Originally Posted by
John Valuk
The only output number I have seen for these is from the Cygolite web site, where they state, "350 lumens flashing".
Have you ever seen a source specifying the output for their "steady" modes?
In the flashlight world, it's not uncommon to see independent output measurements performed by enthusiasts as part of their reviews, but that's not often the case with bike lights.
Independent verification of
any claimed output/durability/efficiency is the sort of thing almost never done with a great range of products. Leaving manufacturers to essentially claim whatever they will.
Given Cygolite's descriptive remarks and manuals are so spartan, can't say that I've seen any other references to "350 lumens" anywhere.
What I can say is that the Hypershot 350, in practice out on the road, is so vastly above the brightness and visibility of every other taillight I've ever used or seen. Works sufficiently well for the great majority of cycling situations. Bummer that it doesn't appear to be the case, here.