Originally Posted by
mechBgon
Ok, get a Shiningbeam S-Mini, an 18650 cell, a lockblock, and a Cygolite Hotshot. Total weight on bike: about 160 grams. On Medium, the S-Mini will do at least 8 hours or more on one 18650, and you can carry spares at 45 grams apiece if you want. The Hotshot is a monster. Bonus: the lights can be shoved in your pocket if you have to park outside.
These two lights seem to be without peer in terms of lumens per ounce. I certainly thank you for pointing them out to me. While maybe not ultimate, this combo seems way more than enough for serious night rides.