I was sure that I wanted a Dinotte Tail Light until I passed one at night in a car... There IS such a thing as too much light. It may be a combination of a bright assed light and a poor job aiming the light properly, but it was not safe. The amount of glare on the windshield alone (dirty from camping), made it difficult to maintain my bearings in my lane. I found myself driving by braile as I passed the chap.
A combination of a PBSF, TL-LD1000 and a blinkie 3 (on the back of my helmet) have served my purpose thus far... Saving my money for other toys...