There's nothing wrong with the Dinotte, but IMO it's too much light. Yes, I think there is such a thing. I have a Serfas Shield (well, will once it gets back from the manufacturer, see elsewhere in the thread) and it's right at the limit of what I would want to run. In fact in high mode it's probably a little too bright. So that sets $60 as about as much as one needs to spend on a tail light to get as much light as I really want to run anyway.

I had a Dinotte taillight (140R) in the past, but I sold it and bought a Magicshine taillight for $30 which ran off my headlight battery and was pretty much exactly the same light as the $120 Dinotte (and is still working 3 years later - the Dinotte's AA cell pack is a BAD IDEA and died on me every time it rained).