I had a Dinotte 140R a few years ago. It's not any brighter than several lights I have now though.

For that level of brightness (which really is quite good) I think the way to go is a Magicshine - for $30 with a Y adapter and hook it to the same battery that my headlights use, it's absolutely unbeatable value for money. I've been using the MagicShine on and off for 3 or 4 years now. I don't seem to be able to settle on one light package, I like to move the lights around.

I was just reading the manual for the Designshine taillight which should be showing up at my house tomorrow. All I can say is, I'm glad it has many brightness levels available. It has warnings like "do not shine the light at your skin at close distance (1/8") - the light is bright enough to burn your skin."

They have a chart of power levels that should absolutely only ever be used in the daytime.