I saw some videos of that light. Damn bright. However, unless you are riding on the highway and cars miles behind you may catch you in a minute, isn't that kind of too-bright taillight annoying to the drivers? I ride mostly on city streets, so I guess no need of it? (costs about half my bike price, too
)
It is not annoying, but it really catches your attention.
The Dinotte lights have 3 brightness settings: 25%, 50%, 100%.
You don't need to run it at 100% all the time.
I change the settings of mine depending on the current situation.
On a busy road with little/no bike lane I'll use 100% for safety, but on a quiet road with a generous bike lane I may use 25% to preserve battery life.